iopoll: Ensure we do not clash with existing functions

Signed-off-by: Olliver Schinagl <oliver@schinagl.nl>

drivers/net/wwan/t7xx/t7xx_dpmaif.c

@@ -28,8 +28,10 @@
 #include "t7xx_dpmaif.h"
 #include "t7xx_reg.h"
 
+#ifndef ioread32_poll_timeout_atomic
 #define ioread32_poll_timeout_atomic(addr, val, cond, delay_us, timeout_us) \
 	readx_poll_timeout_atomic(ioread32, addr, val, cond, delay_us, timeout_us)
+#endif
 
 static int t7xx_dpmaif_init_intr(struct dpmaif_hw_info *hw_info)
 {