MIPS: Octeon: remove orphan octeon_hal_setup_reserved32() declaration

All uses of octeon_hal_setup_reserved32() were removed by
commit 1ef28870 ("MIPS: Octeon: Remove vestiges of
CONFIG_CAVIUM_RESERVE32_USE_WIRED_TLB"), so remove the
orphan declaration, too.
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

arch/mips/include/asm/octeon/octeon.h

@@ -43,7 +43,6 @@ extern int octeon_get_southbridge_interrupt(void);
 extern int octeon_get_boot_coremask(void);
 extern int octeon_get_boot_num_arguments(void);
 extern const char *octeon_get_boot_argument(int arg);
-extern void octeon_hal_setup_reserved32(void);
 extern void octeon_user_io_init(void);
 
 extern void octeon_init_cvmcount(void);