net: wangxun: limit tx_max_coalesced_frames_irq

Add limitation on tx_max_coalesced_frames_irq as 0 ~ 65535, because
'wx->tx_work_limit' is declared as a member of type u16.

Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20250821023408.53472-3-jiawenwu@trustnetic.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>