[ARM] 3379/1: ixp2000: use generic 8250 debug macros

Patch from Lennert Buytenhek

The xscale UART in the ixp2000 is basically just an 8250 UART (with
some extra bits and pieces), so we can use the generic 8250 debug
macros on the ixp2000.
Signed-off-by: NLennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

include/asm-arm/arch-ixp2000/debug-macro.S

@@ -23,18 +23,5 @@
 #endif
 		.endm
 
-		.macro	senduart,rd,rx
-		strb	\rd, [\rx]
-		.endm
-
-		.macro	busyuart,rd,rx
-1002:		ldrb	\rd, [\rx, #0x14]
-		tst	\rd, #0x20
-		beq	1002b
-		.endm
-
-		.macro	waituart,rd,rx
-		nop
-		nop
-		nop
-		.endm
+#define UART_SHIFT	2
+#include <asm/hardware/debug-8250.S>