firmware: socfpga: Fix a bug in fpgamgr_program_write_buf()
Fix a bug in fpgamgr_program_write_buf() where .rbf file whose length
is not a multiple of 4 would cause an integer overflow which would
result in infinite loop.
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>