MIPS: fix case mismatch in local_r4k_flush_icache_range()

MIPS: fix case mismatch in local_r4k_flush_icache_range()

Currently, Loongson-2 call protected_blast_icache_range() and others
call protected_loongson23_blast_icache_range(), but I think the correct
behavior should be the opposite.  BTW, Loongson-3's cache-ops is
compatible with MIPS64, but not compatible with Loongson-2.  So, rename
xxx_loongson23_yyy things to xxx_loongson2_yyy.

The patch fixes early boot hang with 3.13-rc1, introduced in commit
14bd8c082016 ("MIPS: Loongson: Get rid of Loongson 2 #ifdefery all over
arch/mips").

Signed-off-by: Huacai Chen <[email protected]>
Signed-off-by: Aaro Koskinen <[email protected]>
Reviewed-by: Aurelien Jarno <[email protected]>
Acked-by: John Crispin <[email protected]>
Cc: Ralf Baechle <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>