scsi: message: fusion: Avoid -Wempty-body warnings

There are a couple of warnings in this driver when building with W=1:

drivers/message/fusion/mptbase.c: In function 'PrimeIocFifos':
drivers/message/fusion/mptbase.c:4608:65: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body]
4608 | "restoring 64 bit addressing\n", ioc->name));
| ^
drivers/message/fusion/mptbase.c:4633:65: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body]
4633 | "restoring 64 bit addressing\n", ioc->name));

The macros are slightly suboptimal since are not proper statements.
Change both versions to the usual "do { ... } while (0)" style to
make them more robust and avoid the warning.

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Arnd Bergmann <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/message/fusion/mptdebug.h

···
 
 #ifdef CONFIG_FUSION_LOGGING
 #define MPT_CHECK_LOGGING(IOC, CMD, BITS)			\
-{								\
+do {								\
 	if (IOC->debug_level & BITS)				\
 		CMD;						\
-}
+} while (0)
 #else
-#define MPT_CHECK_LOGGING(IOC, CMD, BITS)
+#define MPT_CHECK_LOGGING(IOC, CMD, BITS)			\
+do { } while (0)
 #endif