remoteproc: Fix RPROC_CARVEOUT_USE_IOREMAP macro usage

Fix compilation warning:
drivers/remoteproc/remoteproc_core.c:588:5: warning:
"RPROC_CARVEOUT_USE_IOREMAP" is not defined [-Wundef]
 #if RPROC_CARVEOUT_USE_IOREMAP
     ^
drivers/remoteproc/remoteproc_core.c:806:6: warning:
"RPROC_CARVEOUT_USE_IOREMAP" is not defined [-Wundef]
 #if !RPROC_CARVEOUT_USE_IOREMAP

Signed-off-by: Michal Simek <michal.simek@xilinx.com>