MIPS: Use hardware watchpoints on all R1 and R2 CPUs.

The previous definition inadvertently omits Octeon which currently is
treated as an architecture variant separate from MIPS32 and MIPS64.
Signed-off-by: NDavid Daney <ddaney@caviumnetworks.com>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/Kconfig

@@ -1365,7 +1365,7 @@ config CPU_SUPPORTS_64BIT_KERNEL
 #
 config HARDWARE_WATCHPOINTS
        bool
-       default y if CPU_MIPS32 || CPU_MIPS64
+       default y if CPU_MIPSR1 || CPU_MIPSR2
 
 menu "Kernel type"