MIPS: Use CKSEG1ADDR for uncached handler

"MIPS: Calculate proper ebase value for 64-bit kernels"
9af43ea080dd5d6c7b34f38261780e5dd43537bc (lmo) rsp.
f6be75d03c8870be91e6e2a195648ece04b6bb16 (kernel.org) broke some 64-bit
MIPS systems.

Before this we were using XKPHYS/cached as ebase and computed the uncached
xphsys/unchached address for that area. After that commit ebase became a
32-bit compat address and convert does not work anymore.  We now should use
CKSEG1 for this. CKSEG1ADDR does just that in 32-bit and 64-bit.

Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
To: Ralf Baechle <ralf@linux-mips.org>
Patchwork: http://patchwork.linux-mips.org/patch/1149/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kernel/traps.c

@@ -1562,12 +1562,7 @@ static char panic_null_cerr[] __cpuinitdata =
 void __cpuinit set_uncached_handler(unsigned long offset, void *addr,
 	unsigned long size)
 {
-#ifdef CONFIG_32BIT
-	unsigned long uncached_ebase = KSEG1ADDR(ebase);
-#endif
-#ifdef CONFIG_64BIT
-	unsigned long uncached_ebase = TO_UNCAC(ebase);
-#endif
+	unsigned long uncached_ebase = CKSEG1ADDR(ebase);
 
 	if (!addr)
 		panic(panic_null_cerr);