MIPS: OCTEON: Get rid of CONFIG_CAVIUM_OCTEON_HW_FIX_UNALIGNED

When you turn it off, the kernel is unusable, so get rid of the option
and always allow unaligned access.

The Octeon specific memcpy intentionally does unaligned accesses and it
must not fault.

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5303/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/include/asm/mach-cavium-octeon/kernel-entry-init.h

@@ -34,15 +34,10 @@
 	ori	v0, CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE
 	dmtc0	v0, CP0_CVMMEMCTL_REG	# Write the cavium mem control register
 	dmfc0	v0, CP0_CVMCTL_REG	# Read the cavium control register
-#ifdef CONFIG_CAVIUM_OCTEON_HW_FIX_UNALIGNED
 	# Disable unaligned load/store support but leave HW fixup enabled
+	# Needed for octeon specific memcpy
 	or  v0, v0, 0x5001
 	xor v0, v0, 0x1001
-#else
-	# Disable unaligned load/store and HW fixup support
-	or  v0, v0, 0x5001
-	xor v0, v0, 0x5001
-#endif
 	# Read the processor ID register
 	mfc0 v1, CP0_PRID_REG
 	# Disable instruction prefetching (Octeon Pass1 errata)