Camera: Bring over camera driver changes

Bring over camera driver changes as of msm-4.19
commit  5a5551a7 (Merge "msm: camera: reqmgr: Fix CRM
shift one req issue").

Change-Id: Ic0c2b2d74d1b3470c1c51d98228e312fb13c501a
Signed-off-by: Jigarkumar Zala <jzala@codeaurora.org>

drivers/cam_utils/cam_common_util.h

@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2017-2019, The Linux Foundation. All rights reserved.
+ */
+
+#ifndef _CAM_COMMON_UTIL_H_
+#define _CAM_COMMON_UTIL_H_
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+
+#define CAM_BITS_MASK_SHIFT(x, mask, shift) (((x) & (mask)) >> shift)
+
+#define PTR_TO_U64(ptr) ((uint64_t)(uintptr_t)ptr)
+#define U64_TO_PTR(ptr) ((void *)(uintptr_t)ptr)
+
+/**
+ * cam_common_util_get_string_index()
+ *
+ * @brief                  Match the string from list of strings to return
+ *                         matching index
+ *
+ * @strings:               Pointer to list of strings
+ * @num_strings:           Number of strings in 'strings'
+ * @matching_string:       String to match
+ * @index:                 Pointer to index to return matching index
+ *
+ * @return:                0 for success
+ *                         -EINVAL for Fail
+ */
+int cam_common_util_get_string_index(const char **strings,
+	uint32_t num_strings, const char *matching_string, uint32_t *index);
+
+/**
+ * cam_common_util_remove_duplicate_arr()
+ *
+ * @brief                  Move all the unique integers to the start of
+ *                         the array and return the number of unique integers
+ *
+ * @array:                 Pointer to the first integer of array
+ * @num:                   Number of elements in array
+ *
+ * @return:                Number of unique integers in array
+ */
+uint32_t cam_common_util_remove_duplicate_arr(int32_t *array,
+	uint32_t num);
+
+#endif /* _CAM_COMMON_UTIL_H_ */