sdm: drm: Add support for default non-atomic mode

Add support for booting up with default non-atomic mode
Add libdrmutils that currently has:
DRMMaster:
    Creates a master DRM session
    Converts ION handles to DRM FB_ID
DRMResMgr:
    Enables a default display path by providing APIs for
    connector id, crtc id, mode etc

Change-Id: I1dc697d2cc5e3fa744c99e2c9ddd57bf06e78c4f
CRs-fixed: 1114808

sdm/include/utils/utils.h

@@ -36,6 +36,13 @@ float gcd(float a, float b);
 float lcm(float a, float b);
 void CloseFd(int *fd);
 
+enum class DriverType {
+    FB = 0,
+    DRM,
+};
+
+DriverType GetDriverType();
+
 }  // namespace sdm
 
 #endif  // __UTILS_H__