refactor: moved drivers hdr files to include/drivers/nxp

NXP drivers header files are moved:
  - from:  drivers/nxp/<xx>/*.h
  - to  :  include/drivers/nxp/<xx>/*.h

To accommodate these changes each drivers makefiles
drivers/nxp/<xx>/xx.mk, are updated.

Signed-off-by: Pankaj Gupta <pankaj.gupta@nxp.com>
Change-Id: I3979c509724d87e3d631a03dbafda1ee5ef07d21
diff --git a/drivers/nxp/ddr/nxp-ddr/ddr.mk b/drivers/nxp/ddr/nxp-ddr/ddr.mk
index 866c092..6bdd947 100644
--- a/drivers/nxp/ddr/nxp-ddr/ddr.mk
+++ b/drivers/nxp/ddr/nxp-ddr/ddr.mk
@@ -4,8 +4,6 @@
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
-DDR_DRIVERS_PATH	:= ${PLAT_DRIVERS_PATH}/ddr
-
 ifeq ($(PLAT_DDR_PHY), PHY_GEN2)
 $(eval $(call add_define, PHY_GEN2))
 PLAT_DDR_PHY_DIR		:= phy-gen2
@@ -68,12 +66,11 @@
 $(eval $(call add_define, DEBUG_DDR_INPUT_CONFIG))
 endif
 
-DDR_CNTLR_SOURCES	:= $(DDR_DRIVERS_PATH)/nxp-ddr/ddr.c \
-			   $(DDR_DRIVERS_PATH)/nxp-ddr/ddrc.c \
-			   $(DDR_DRIVERS_PATH)/nxp-ddr/dimm.c \
-			   $(DDR_DRIVERS_PATH)/nxp-ddr/regs.c \
-			   $(DDR_DRIVERS_PATH)/nxp-ddr/utility.c \
-			   $(DDR_DRIVERS_PATH)/$(PLAT_DDR_PHY_DIR)/phy.c
+DDR_CNTLR_SOURCES	:= $(PLAT_DRIVERS_PATH)/ddr/nxp-ddr/ddr.c \
+			   $(PLAT_DRIVERS_PATH)/ddr/nxp-ddr/ddrc.c \
+			   $(PLAT_DRIVERS_PATH)/ddr/nxp-ddr/dimm.c \
+			   $(PLAT_DRIVERS_PATH)/ddr/nxp-ddr/regs.c \
+			   $(PLAT_DRIVERS_PATH)/ddr/nxp-ddr/utility.c \
+			   $(PLAT_DRIVERS_PATH)/ddr/$(PLAT_DDR_PHY_DIR)/phy.c
 
-PLAT_INCLUDES		+= -I$(DDR_DRIVERS_PATH)/nxp-ddr \
-			   -I$(DDR_DRIVERS_PATH)/include
+PLAT_INCLUDES		+= -I$(PLAT_DRIVERS_INCLUDE_PATH)/ddr