[PATCH] mm/pg-r4k.c: Fix a typo in an R4600 v2 erratum workaround

["Maciej W. Rozycki" <macro@linux-mips.org>]

 Restore a load from KSEG1 done as a workaround for an R4600 v2 
erratum, dropped with 211be16de99a7424e66c0b6c0d00e2c970508ac2.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
---
Thiemo,

 It reverts your change of Sep 1st, 2005; given the way the code is 
written, I am assuming the change was accidental, correct?  At the moment 
the load never happens.

 Ralf, please apply.

  Maciej

patch-mips-2.6.23-rc5-20070904-pg-r4k-r4600-0
diff -up --recursive --new-file 
linux-mips-2.6.23-rc5-20070904.macro/arch/mips/mm/pg-r4k.c 
linux-mips-2.6.23-rc5-20070904/arch/mips/mm/pg-r4k.c
--- linux-mips-2.6.23-rc5-20070904.macro/arch/mips/mm/pg-r4k.c  2007-02-05 
16:38:47.000000000 +0000
+++ linux-mips-2.6.23-rc5-20070904/arch/mips/mm/pg-r4k.c        2007-10-02 
00:15:33.000000000 +0000
@@ -209,7 +209,7 @@ static inline void build_cdex_p(void)
        }
 
        if (R4600_V2_HIT_CACHEOP_WAR && cpu_is_r4600_v2_x())
-               build_insn_word(0x3c01a000);    /* lui     $at, 0xa000  */
+               build_insn_word(0x8c200000);    /* lw      $zero, ($at) */
 
        mi.c_format.opcode     = cache_op;
        mi.c_format.rs         = 4;             /* $a0 */