ARM: OMAP: Split plat/serial.h for omap1 and omap2+

For omap1, we'll keep mach/serial.h around for 8250.c hardware
workarounds. For omap2+, we no longer need mach/serial.h and
can make it local to mach-omap2.

Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/include/mach/debug-macro.S

@@ -13,7 +13,7 @@
 
 #include <linux/serial_reg.h>
 
-#include <plat/serial.h>
+#include <../mach-omap2/serial.h>
 
 #define UART_OFFSET(addr)	((addr) & 0x00ffffff)
 

arch/arm/mach-omap2/include/mach/uncompress.h

@@ -23,7 +23,7 @@
 #include <asm/memory.h>
 #include <asm/mach-types.h>
 
-#include <plat/serial.h>
+#include <../mach-omap2/serial.h>
 
 #define MDR1_MODE_MASK			0x07