[ARM] 3621/1: fix compilation breakage for pnx4008

Patch from Vitaly Wool

pnx4008_defconfig fails to build:

include/asm/hardware/debug-8250.S: Assembler messages:
include/asm/hardware/debug-8250.S:12: Error: Macro with this name was already defined.

This is due to senduart macro erroneously defined in include/asm-arm/arch-pnx4008/debug-macro.S. This patch removes it from that file.
Signed-off-by: NVitaly Wool <vwool@ru.mvista.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

include/asm-arm/arch-pnx4008/debug-macro.S

@@ -19,9 +19,5 @@
 		addne	\rx, \rx, #0xf4000000
 		.endm
 
-		.macro	senduart,rd,rx
-		strb	\rd, [\rx, #0x0]
-		.endm
-
 #define UART_SHIFT	2
 #include <asm/hardware/debug-8250.S>