[PATCH] Au1xx0: really set KSEG0 to uncached on reboot

[Sergei Shtylylov <sshtylyov@ru.mvista.com>]

Hello.

   Just found really old buglet in AMD Au1xx0 restart code: instead of
modifying the whole CP0 Config.K0 field to 010b (meaning KSEG0 uncached) 
before flushing the caches and resetting a board, it only sets bit 1 of that 
reg. which is effectively a NOP since Config.K0 == 011b as the kernel sets it 
up (which is also its default value for Au1xx0).
WBR, Sergei

diff --git a/arch/mips/au1000/common/reset.c b/arch/mips/au1000/common/reset.c
index 65b84db..4ffcced 100644
--- a/arch/mips/au1000/common/reset.c
+++ b/arch/mips/au1000/common/reset.c
@@ -151,7 +151,7 @@ void au1000_restart(char *command)
        }
 
        set_c0_status(ST0_BEV | ST0_ERL);
-       set_c0_config(CONF_CM_UNCACHED);
+       change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
        flush_cache_all();
        write_c0_wired(0);