MIPS: Enable hugepage support for MIPS64r6

Our hugepage support already exists for MIPS64 CPUs, and is already
enabled for older architecture revisions. There's nothing MIPSr6
specific involved, and our hugepage support already works fine for
MIPS64r6 CPUs such as the I6500, so allow it to be selected in Kconfig.
Signed-off-by: NPaul Burton <paul.burton@mips.com>
Cc: linux-mips@vger.kernel.org

arch/mips/Kconfig

@@ -1539,6 +1539,7 @@ config CPU_MIPS64_R6
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_64BIT_KERNEL
 	select CPU_SUPPORTS_HIGHMEM
+	select CPU_SUPPORTS_HUGEPAGES
 	select CPU_SUPPORTS_MSA
 	select MIPS_O32_FP64_SUPPORT if 32BIT || MIPS32_O32
 	select HAVE_KVM