Remove Kconfig variable that has no effect

DYNAMIC_CBMEM is only selected a couple of times but never declared
or read. Remove it.

Change-Id: I5016dac2c935d3f261001e9f388a8989540e93ae
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: http://review.coreboot.org/10255
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)

src/soc/broadcom/cygnus/Kconfig

@@ -25,7 +25,6 @@ config SOC_BROADCOM_CYGNUS
 	select ARCH_ROMSTAGE_ARMV7
 	select ARCH_VERSTAGE_ARMV7
 	select BOOTBLOCK_CONSOLE
-	select DYNAMIC_CBMEM
 	select EARLY_CONSOLE
 	select GENERIC_UDELAY
 	select HAVE_MONOTONIC_TIMER

src/soc/imgtec/pistachio/Kconfig

@@ -21,7 +21,6 @@
 
 config CPU_IMGTEC_PISTACHIO
 	select CPU_MIPS
-	select DYNAMIC_CBMEM
 	select GENERIC_UDELAY
 	select HAVE_MONOTONIC_TIMER
 	select HAVE_UART_MEMORY_MAPPED

src/soc/marvell/bg4cd/Kconfig

@@ -26,7 +26,6 @@ config SOC_MARVELL_BG4CD
 	select ARCH_VERSTAGE_ARMV7_M
 	select ARM_BOOTBLOCK_CUSTOM if VBOOT_VERIFY_FIRMWARE
 	select BOOTBLOCK_CONSOLE
-	select DYNAMIC_CBMEM
 	select EARLY_CONSOLE
 	select GENERIC_UDELAY
 	select HAVE_MONOTONIC_TIMER

src/soc/nvidia/tegra132/Kconfig

@@ -14,7 +14,6 @@ config SOC_NVIDIA_TEGRA132
 	select HAVE_UART_MEMORY_MAPPED
 	select EARLY_CONSOLE
 	select ARM_BOOTBLOCK_CUSTOM
-	select DYNAMIC_CBMEM
 	select SMP
 	select ARM64_USE_SECURE_MONITOR
 	select GENERIC_GPIO_LIB

src/soc/qualcomm/ipq806x/Kconfig

@@ -7,7 +7,6 @@ config SOC_QC_IPQ806X
 	select ARCH_RAMSTAGE_ARMV7
 	select BOOTBLOCK_CONSOLE
 	select CHROMEOS_VBNV_FLASH
-	select DYNAMIC_CBMEM
 	select HAVE_UART_SPECIAL
 	select SPI_ATOMIC_SEQUENCING
 	select GENERIC_GPIO_LIB