arm: Move FSL_LSCH2 FSL_LSCH3 to Kconfig

Move these options to Kconfig and create a sub-menu to avoid name
conflict with other architectures.

Signed-off-by: York Sun <york.sun@nxp.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/cpu/armv7/ls102xa/Kconfig b/arch/arm/cpu/armv7/ls102xa/Kconfig
index f0e7ae9..2648416 100644
--- a/arch/arm/cpu/armv7/ls102xa/Kconfig
+++ b/arch/arm/cpu/armv7/ls102xa/Kconfig
@@ -2,6 +2,14 @@
 	bool
 	select SYS_FSL_ERRATUM_A010315
 
+menu "LS102xA architecture"
+	depends on ARCH_LS1021A
+
 config LS1_DEEP_SLEEP
 	bool "Deep sleep"
 	depends on ARCH_LS1021A
+
+config SYS_FSL_ERRATUM_A010315
+	bool "Workaround for PCIe erratum A010315"
+
+endmenu