cpu/*: Add whitespace around '<<'

Change-Id: Id46c0b57bd7c9b954b29537c70254df947690e0b
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/20397
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/cpu/amd/pi/cache_as_ram.inc

@@ -43,7 +43,7 @@ cache_as_ram_setup:
   /* Turn on OSFXSR [BIT9] and OSXMMEXCPT [BIT10] onto CR4 register */
 
   movl %cr4, %eax
-  orl $(3<<9), %eax
+  orl $(3 << 9), %eax
   movl %eax, %cr4
 
   /* Get the cpu_init_detected */