disp: msm: drmP.h removed, add new headers

Commit ("drm: delete drmP.h + drm_os_linux.h") removes the
drmP header file. This changes updates the msm driver
by adding the individually required header files.

Change-Id: I360aa028c2ce75317d33da988b36164041177014
Signed-off-by: Samantha Tran <samtran@codeaurora.org>
Signed-off-by: Nilaan Gunabalachandran <ngunabal@codeaurora.org>

msm/dsi/dsi_clk.h

@@ -10,7 +10,6 @@
 #include <linux/platform_device.h>
 #include <linux/types.h>
 #include <linux/clk.h>
-#include <drm/drmP.h>
 
 #define MAX_STRING_LEN 32
 #define MAX_DSI_CTRL 2