arm: Fix Kconfig for proper display menu

Some config options should not have prompt. They are selected by choosing
target.

Signed-off-by: York Sun <york.sun@nxp.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/arm/cpu/armv7/ls102xa/Kconfig

 config ARCH_LS1021A
-	bool "Freescale Layerscape LS1021A SoC"
+	bool
 	select SYS_FSL_ERRATUM_A010315
 
 config LS1_DEEP_SLEEP
-	bool "Freescale Layerscape 1 deep sleep"
+	bool "Deep sleep"
+	depends on ARCH_LS1021A

arch/arm/cpu/armv8/fsl-layerscape/Kconfig

 config ARCH_LS1012A
-	bool "Freescale Layerscape LS1012A SoC"
+	bool
 	select SYS_FSL_MMDC
 	select SYS_FSL_ERRATUM_A010315
 
 config ARCH_LS1043A
-	bool "Freescale Layerscape LS1043A SoC"
+	bool
 	select SYS_FSL_ERRATUM_A010315
 	select SYS_FSL_ERRATUM_A010539
 
 config ARCH_LS1046A
-	bool "Freescale Layerscape LS1046A SoC"
+	bool
 	select SYS_FSL_ERRATUM_A010539
 
+config ARCH_LS2080A
+	bool
+
 config SYS_FSL_MMDC
-	bool "Freescale Multi Mode DDR Controller"
+	bool
 
 config SYS_FSL_ERRATUM_A010315
 	bool "Workaround for PCIe erratum A010315"