MIPS: Alchemy: debug output for compressed kernels

Hook up the compressed debug output for all Alchemy systems supported
by current kernel codebase.
Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
To: Linux-MIPS <linux-mips@linux-mips.org>
Cc: Wu Zhangjin <wuzhangjin@gmail.com>
Patchwork: http://patchwork.linux-mips.org/patch/879/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/boot/compressed/Makefile

@@ -36,6 +36,7 @@ KBUILD_AFLAGS := $(LINUXINCLUDE) $(KBUILD_AFLAGS) -D__ASSEMBLY__ \
 obj-y := $(obj)/head.o $(obj)/decompress.o $(obj)/dbg.o
 
 obj-$(CONFIG_SYS_SUPPORTS_ZBOOT_UART16550) += $(obj)/uart-16550.o
+obj-$(CONFIG_MACH_ALCHEMY)		   += $(obj)/uart-alchemy.o
 
 OBJCOPYFLAGS_vmlinux.bin := $(OBJCOPYFLAGS) -O binary -R .comment -S
 $(obj)/vmlinux.bin: $(KBUILD_IMAGE)

arch/mips/boot/compressed/uart-alchemy.c

+#include <asm/mach-au1x00/au1000.h>
+
+void putc(char c)
+{
+	/* all current (Jan. 2010) in-kernel boards */
+	alchemy_uart_putchar(UART0_PHYS_ADDR, c);
+}