iMX: Fix build for iMX53

Commit fad107086d fixed the wrong test for MX51
as the MX51 addresses are wrong for MX50 and MX53 but now it's MX51 only,
UART_PADDR is not defined anymore when building for MX50/MX53.

Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Tested-by: Steev Klimaszewski <steev@genesi-usa.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arch/arm/plat-mxc/include/mach/debug-macro.S

@@ -44,6 +44,14 @@
 #define UART_PADDR	MX51_UART1_BASE_ADDR
 #endif
 
+/* iMX50/53 have same addresses, but not iMX51 */
+#if defined(CONFIG_SOC_IMX50) || defined(CONFIG_SOC_IMX53)
+#ifdef UART_PADDR
+#error "CONFIG_DEBUG_LL is incompatible with multiple archs"
+#endif
+#define UART_PADDR	MX53_UART1_BASE_ADDR
+#endif
+
 #define UART_VADDR	IMX_IO_ADDRESS(UART_PADDR)
 
 		.macro	addruart, rp, rv