orion5x: fix comment-in-comment typo in cpu.h

Signed-off-by: Albert Aribaud <albert.aribaud@free.fr>

arch/arm/include/asm/arch-orion5x/cpu.h

@@ -76,7 +76,7 @@ enum orion5x_cpu_attrib {
 
 /*
  * Device Address MAP BAR values
-/*
+ *
  * All addresses and sizes not defined by board code
  * will be given default values here.
  */