QcomModulePkg: Buffer overflow maybe occur when convert string from ASCII to Unicode

The max size of ptn_name is 72, the max size of PartitionNameFromMeta is
36, it will cause the buffer overflow issue if the actual string size of
ptn_name is lager than 36 when covent string form ASCII to Unicore.

AsciiStrToUnicodeStr (img_header_entry[i].ptn_name, PartitionNameFromMeta).

Change-Id: I51d94e415e1f92a65155c01b030a4332ff679947
1 file changed