src/cpu: Add required space before opening parenthesis '('

Change-Id: I7fb9bfcaeec0b9dfd0695d2b2d398fd01091f6bc
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/16286
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Omar Pakker

src/cpu/amd/microcode/microcode.c

@@ -23,7 +23,7 @@
 #include <smp/spinlock.h>
 
 #define UCODE_DEBUG(fmt, args...)	\
-	do { printk(BIOS_DEBUG, "[microcode] "fmt, ##args); } while(0)
+	do { printk(BIOS_DEBUG, "[microcode] "fmt, ##args); } while (0)
 
 #define UCODE_MAGIC			0x00414d44
 #define UCODE_EQUIV_CPU_TABLE_TYPE	0x00000000