ANDROID: Fix scmi driver for platform do not have a a2p interrupt

The "scmi_info->irq" get -22 (-EINVAL) when no "a2p" interrupt, keep to
use (scmi_info->irq > 0) as if condition to avoid BUG happen like this:

For cherry picked patch 18126b26 (UPSTREAM: firmware: arm_scmi: Fix chan_free cleanup on SMC),
it depends on below two patches from mainline to avoid the BUG we met.
f716cbd3 firmware: arm_scmi: Make smc transport use common completions
a690b7e6 firmware: arm_scmi: Add configurable polling mode for transports

These two patch can't apply directly now, quiet a lot of changes need to merge,
which is much higher risk than just apply this simple fix.

[ 0.199652][ T1] arm-scmi firmware:scmi: SCMI Notifications - Core Enabled.
[ 0.200296][ T1] list_add corruption. prev is NULL.
[ 0.200773][ T1] ------------[ cut here ]------------
[ 0.201242][ T1] kernel BUG at lib/list_debug.c:24!
[ 0.201696][ T1] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
[ 0.202246][ T1] Modules linked in:
[ 0.202581][ T1] CPU: 4 PID: 1 Comm: swapper/0 Not tainted 5.10.214-android13-4-00002-g4c868a6e89f5-ab12097184 #1
[ 0.203511][ T1] Hardware name: Rockchip RK3588S EVB8 LP4X V10 Board (DT)
[ 0.204137][ T1] pstate: 60800085 (nZCv daIf -PAN +UAO -TCO BTYPE=--)
[ 0.204735][ T1] pc : list_add_valid+0x80/0xc0
[ 0.205168][ T1] lr : __list_add_valid+0x80/0xc0
[ 0.205599][ T1] sp : ffffffc00b24b700
[ 0.205958][ T1] x29: ffffffc00b24b700 x28: 0000000000000002
[ 0.206494][ T1] x27: 00000000000000e0 x26: ffffff810019ca00
[ 0.207027][ T1] x25: 0000000000000000 x24: ffffff810122c1e0
[ 0.207560][ T1] x23: ffffff810122c1d8 x22: ffffffc00b24b728
[ 0.208097][ T1] x21: ffffff810122c1d0 x20: 0000000000000000
[ 0.208631][ T1] x19: 7fffffffffffffff x18: ffffffc00b2350b8
[ 0.209165][ T1] x17: ffffffffffffffff x16: 0000000000000000
[ 0.209697][ T1] x15: 0000000000000004 x14: ffffffc00af6d130
[ 0.210231][ T1] x13: 0000000000000fff x12: 0000000000000003
[ 0.210769][ T1] x11: 00000000ffffffff x10: c0000000ffffefff
[ 0.211300][ T1] x9 : 91b264ed20239600 x8 : 91b264ed20239600
[ 0.211834][ T1] x7 : 322e30202020205b x6 : ffffffc00b1873d8
[ 0.212365][ T1] x5 : ffffffc00b184fee x4 : 0000000000000000
[ 0.212896][ T1] x3 : 0000000000000000 x2 : 0000000000000000
[ 0.213426][ T1] x1 : ffffffc00b24b4d0 x0 : 0000000000000022
[ 0.213959][ T1] Call trace:
[ 0.214239][ T1] __list_add_valid+0x80/0xc0
[ 0.214645][ T1] wait_for_common+0x104/0x308
[ 0.215059][ T1] smc_send_message+0x100/0x2a8
[ 0.215477][ T1] do_xfer+0x128/0x858
[ 0.215826][ T1] version_get+0x88/0x20c
[ 0.216198][ T1] scmi_base_protocol_init+0x6c/0x720
[ 0.216663][ T1] scmi_get_protocol_instance+0x1f4/0x49c
[ 0.217156][ T1] scmi_probe+0x244/0x724
[ 0.217531][ T1] platform_drv_probe+0x60/0x17c
[ 0.217956][ T1] really_probe+0x310/0x974
[ 0.218342][ T1] driver_probe_device+0x74/0x298
[ 0.218776][ T1] device_driver_attach+0x158/0x208
[ 0.219224][ T1] __driver_attach+0x248/0x420
[ 0.219634][ T1] bus_add_driver+0x1d4/0x498
[ 0.220036][ T1] driver_register+0x84/0x17c
[ 0.220442][ T1] scmi_driver_init+0xb0/0xc0
[ 0.220846][ T1] __initstubkmod_scmi_module__425_1626_scmi_driver_init4.cfi+0x14/0x24
[ 0.221589][ T1] do_one_initcall+0x114/0x3b0
[ 0.221998][ T1] do_initcall_level+0xdc/0x1bc
[ 0.222415][ T1] do_initcalls+0x58/0x9c
[ 0.222785][ T1] do_basic_setup+0x28/0x38
[ 0.223172][ T1] kernel_init_freeable+0xfc/0x1bc
[ 0.223616][ T1] kernel_init+0x2c/0x304
[ 0.223988][ T1] ret_from_fork+0x10/0x30
[ 0.224369][ T1] Code: d4210000 d000c600 9118a800 97e0729d (d4210000)
[ 0.224974][ T1] ---[ end trace 6c77dafcd8f3982d ]---
[ 0.225881][ T1] Kernel panic - not syncing: Oops - BUG: Fatal exception

Bug: 357011632
Fixes: 18126b26 ("UPSTREAM: firmware: arm_scmi: Fix chan_free cleanup on SMC")
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Change-Id: I9d9edb48a313b1e4277749082e41ea02ca5ec2a5