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/timer/timer.mk b/drivers/nxp/timer/timer.mk
index b9e298f..d658d19 100644
--- a/drivers/nxp/timer/timer.mk
+++ b/drivers/nxp/timer/timer.mk
@@ -8,10 +8,8 @@
 
 ADD_TIMER		:= 1
 
-TIMER_DRIVERS_PATH	:=  ${PLAT_DRIVERS_PATH}/timer
-
-PLAT_INCLUDES		+= -I$(TIMER_DRIVERS_PATH)
-TIMER_SOURCES	+= drivers/delay_timer/delay_timer.c	\
+PLAT_INCLUDES		+= -I$(PLAT_DRIVERS_INCLUDE_PATH)/timer
+TIMER_SOURCES		+= drivers/delay_timer/delay_timer.c	\
 			   $(PLAT_DRIVERS_PATH)/timer/nxp_timer.c
 
 ifeq (${BL_COMM_TIMER_NEEDED},yes)