MIPS: add tune for MIPS 34kc

Add tune Kconfig option for MIPS 34kc.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

arch/mips/Kconfig

@@ -228,6 +228,9 @@ config MIPS_TUNE_14KC
 config MIPS_TUNE_24KC
 	bool
 
+config MIPS_TUNE_34KC
+	bool
+
 config MIPS_TUNE_74KC
 	bool
 

arch/mips/Makefile

@@ -34,6 +34,7 @@ arch-$(CONFIG_CPU_MIPS64_R6) += -march=mips64r6 -Wa,-mips64r6
 tune-$(CONFIG_MIPS_TUNE_4KC) += -mtune=4kc
 tune-$(CONFIG_MIPS_TUNE_14KC) += -mtune=14kc
 tune-$(CONFIG_MIPS_TUNE_24KC) += -mtune=24kc
+tune-$(CONFIG_MIPS_TUNE_34KC) += -mtune=34kc
 tune-$(CONFIG_MIPS_TUNE_74KC) += -mtune=74kc
 
 # Include default header files