msm: camera: common: Partial Camera Support

This change creates a sysfs entry(subparts_info) which
has info about number of IFEs, IFE-LITEs, SFEs & CUSTOM,
whose values are populated in their respective drivers.
Also, validates whether a particular IFE, SFE and CUSTOM
is supported or not. Based on this, probe of IFE, SFE and
CUSTOM drivers will happen accordingly.

CRs-Fixed: 3482745
Change-Id: Iff6e79a7793b14b1f368f215020617f10dbd4bb5
Signed-off-by: Karthik Dillibabu <quic_kard@quicinc.com>

include/uapi/camera/media/cam_cpas.h

@@ -99,6 +99,9 @@
 #define CAM_CPAS_NON_SECURE_DOMAIN  0
 #define CAM_CPAS_SECURE_DOMAIN      1
 
+/* sysfs entry of camera subparts info */
+#define CAM_SYSFS_SUBPARTS_INFO_FILENAME "subparts_info"
+
 /**
  * struct cam_cpas_fuse_value - CPAS fuse value
  *