MIPS: Add CPC probe, access functions

This patch introduces code to probe for a MIPS Cluster Power Controller
& accessor functions to allow for easy register access. This support
code will be used by a subsequent patch.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6361/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index a3bc014..2a9848e 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -2009,6 +2009,9 @@
 config MIPS_CM
 	bool
 
+config MIPS_CPC
+	bool
+
 config SB1_PASS_1_WORKAROUNDS
 	bool
 	depends on CPU_SB1_PASS_1