[ARM] 4718/1: Fix redefinition warnings in PXA uncompressor code

FFUART and friends are already defined as __REG(x) in pxa-regs.h.
Instead of redefining them here, we can just provide the __REG macro.
Including asm/arch/hardware.h is not an option because this physical
addresses are needed here.
This is a fix for the compiler warnings generated by 4663/1.

Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Acked-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

include/asm-arm/arch-pxa/uncompress.h

@@ -12,10 +12,7 @@
 #include <linux/serial_reg.h>
 #include <asm/arch/pxa-regs.h>
 
-#define FFUART		((volatile unsigned long *)0x40100000)
-#define BTUART		((volatile unsigned long *)0x40200000)
-#define STUART		((volatile unsigned long *)0x40700000)
-#define HWUART		((volatile unsigned long *)0x41600000)
+#define __REG(x)	((volatile unsigned long *)x)
 
 #define UART		FFUART