drivers: misc: Add socfpga_dtreg driver for Intel SoCFPGA

Add socfpga_dtreg driver enablement for Intel SoCFPGA.

Signed-off-by: Wan Yee Lau <wan.yee.lau@intel.com>
Reviewed-by: Tien Fong Chee <tien.fong.chee@intel.com>
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index f11ce72..98043fc 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -689,4 +689,11 @@
 	  the base driver which provides common access methods for the
 	  sub-drivers.
 
+config SPL_SOCFPGA_DT_REG
+	bool "Enable register setting from device tree in SPL"
+	depends on SPL
+	help
+	  Enable register setting from device tree. This also
+	  provides user a clean interface and all register settings are
+	  centralized in one place, device tree.
 endmenu