arm: Move SYS_FSL_IFC_BANK_COUNT to Kconfig

Move this option to Kconfig and clean up existing uses.
This option is also used by PowerPC SoCs.

Signed-off-by: York Sun <york.sun@nxp.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
index 352d1d3..c6cf774 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
+++ b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
@@ -50,4 +50,11 @@
 	  cores, count the reserved ports. This will allocate enough memory
 	  in spin table to properly handle all cores.
 
+config SYS_FSL_IFC_BANK_COUNT
+	int "Maximum banks of Integrated flash controller"
+	depends on ARCH_LS1043A || ARCH_LS1046A || ARCH_LS2080A
+	default 4 if ARCH_LS1043A
+	default 4 if ARCH_LS1046A
+	default 8 if ARCH_LS2080A
+
 endmenu