soc/intel/{APL, BSW, SKL}: Remove unused CPU_ADDR_BITS kconfig

This patch removes CONFIG_CPU_ADDR_BITS kconfig from
soc/intel/<soc>/Kconfig as not getting used anymore.

Change-Id: Ie7fa386c9c0aae19da1fbd09407494d9812247a4
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34768
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: V Sowmya <v.sowmya@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/apollolake/Kconfig

@@ -155,10 +155,6 @@ config DCACHE_BSP_STACK_SIZE
 	  The amount of anticipated stack usage in CAR by bootblock and
 	  other stages.
 
-config CPU_ADDR_BITS
-	int
-	default 39
-
 config SOC_INTEL_COMMON_BLOCK_GSPI_CLOCK_MHZ
 	int
 	default 100

src/soc/intel/braswell/Kconfig

@@ -73,10 +73,6 @@ config MAX_CPUS
 	int
 	default 4
 
-config CPU_ADDR_BITS
-	int
-	default 36
-
 config SMM_TSEG_SIZE
 	hex
 	default 0x800000

src/soc/intel/skylake/Kconfig

@@ -117,10 +117,6 @@ config CBFS_SIZE
 	hex
 	default 0x200000
 
-config CPU_ADDR_BITS
-	int
-	default 36
-
 config DCACHE_RAM_BASE
 	hex
 	default 0xfef00000