[PATCH] ppc32: Fix building of prpmc750

Updated prpmc750 platform code to include serial_reg.h to fix building.
Signed-off-by: NKumar Gala <kumar.gala@freescale.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

arch/ppc/platforms/prpmc750.c

@@ -29,6 +29,7 @@
 #include <linux/ide.h>
 #include <linux/root_dev.h>
 #include <linux/slab.h>
+#include <linux/serial_reg.h>
 
 #include <asm/byteorder.h>
 #include <asm/system.h>