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/qspi/qspi.mk b/drivers/nxp/qspi/qspi.mk
index 3e2c735..b83dee2 100644
--- a/drivers/nxp/qspi/qspi.mk
+++ b/drivers/nxp/qspi/qspi.mk
@@ -1,5 +1,5 @@
 #
-# Copyright 2020 NXP
+# Copyright 2021 NXP
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -8,11 +8,9 @@
 
 QSPI_ADDED		:= 1
 
-QSPI_DRIVERS_PATH	:=  ${PLAT_DRIVERS_PATH}/qspi
-
-QSPI_SOURCES		:=  $(QSPI_DRIVERS_PATH)/qspi.c
+QSPI_SOURCES		:= $(PLAT_DRIVERS_PATH)/qspi/qspi.c
 
-PLAT_INCLUDES		+= -I$(QSPI_DRIVERS_PATH)
+PLAT_INCLUDES		+= -I$(PLAT_DRIVERS_PATH)/qspi
 
 ifeq (${BL_COMM_QSPI_NEEDED},yes)
 BL_COMMON_SOURCES	+= ${QSPI_SOURCES}