disp: msm: make msm_drm into single module

Make msm_drm into single module and all child driver
registers and unregisters are handled from parent's
register and unregister respectively.

Change-Id: I017513d1de3b6b25dd5543d7fa7741c0bac1740d
Signed-off-by: Shashank Babu Chinta Venkata <sbchin@codeaurora.org>
Signed-off-by: Narendra Muppalla <NarendraM@codeaurora.org>
Signed-off-by: Chandan Uddaraju <chandanu@codeaurora.org>

msm/sde_io_util.c

@@ -82,7 +82,6 @@ static struct resource *msm_dss_get_res_byname(struct platform_device *pdev,
 
 	return res;
 } /* msm_dss_get_res_byname */
-EXPORT_SYMBOL(msm_dss_get_res_byname);
 
 int msm_dss_ioremap_byname(struct platform_device *pdev,
 	struct dss_io_data *io_data, const char *name)