ARMv7-R: add new Kconfig entries for d/i-cache

Unlike in ARMv7-A/M, Kconfig entries for data and instruction caches
are currently missing in ARMv7-R. This commit adds those missing Kconfig
entries. Actual implmenetation for those functions will be added in the
subsequent patches.

Signed-off-by: Heesub Shin <heesub.shin@samsung.com>

arch/arm/src/armv7-r/Kconfig

@@ -19,6 +19,29 @@ config ARMV7R_MEMINIT
 		the memory initialization first, then explicitly call
 		arm_data_initialize().
 
+config ARMV7R_HAVE_ICACHE
+	bool
+	default n
+
+config ARMV7R_HAVE_DCACHE
+	bool
+	default n
+
+config ARMV7R_ICACHE
+	bool "Use I-Cache"
+	default n
+	depends on ARMV7R_HAVE_ICACHE
+
+config ARMV7R_DCACHE
+	bool "Use D-Cache"
+	default n
+	depends on ARMV7R_HAVE_DCACHE
+
+config ARMV7R_DCACHE_WRITETHROUGH
+	bool "D-Cache Write-Through"
+	default n
+	depends on ARMV7R_DCACHE
+
 config ARMV7R_HAVE_L2CC
 	bool
 	default n