staging: fwserial: Convert macro into an inline function

Convert macro into an inline function to make codebase better
Signed-off-by: Madhumitha Prabakaran <madhumithabiw@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/fwserial/fwserial.c

@@ -19,7 +19,10 @@
 
 #include "fwserial.h"
 
-#define be32_to_u64(hi, lo)  ((u64)be32_to_cpu(hi) << 32 | be32_to_cpu(lo))
+inline u64 be32_to_u64(__be32 hi, __be32 lo)
+{
+	return ((u64)be32_to_cpu(hi) << 32 | be32_to_cpu(lo));
+}
 
 #define LINUX_VENDOR_ID   0xd00d1eU  /* same id used in card root directory   */
 #define FWSERIAL_VERSION  0x00e81cU  /* must be unique within LINUX_VENDOR_ID */