Fix svace issues

Fix svace issues

- An integer underflow may occur due to arithmetic operation (unsigned subtraction) between values '0' and '1', where the first value comes from the expression 'len - strlen(value)'
- An integer underflow may occur due to arithmetic operation (unsigned subtraction) between variable 'len' and value { [0, 4294967295] } of 'strlen(value)', when 'len' is in range { [1, 2147483647] }
- Possible integer overflow: right operand is tainted. An integer overflow may occur due to arithmetic operation (addition) between value { [-2147483648, 2147483647] } and variable 'duration', where the value comes from 'conf->pattern_duration' and when 'duration' is tainted { [-2147483648, 2147483647] }
- Simplifying loop in insert_raw_data_format

Change-Id: I70d7e24b8473d22207ce0197c04eac97c155eadf
Signed-off-by: pr.jung <pr.jung@samsung.com>