drivers: fpga: intel_sdm_mb: Check SIP SMC status in send_bitstream()

drivers: fpga: intel_sdm_mb: Check SIP SMC status in send_bitstream()

While sending bitstream via SIP SMC, busy status received does not
correspond to error, instead it means transfer is accepted but SDM
doesn't have any more free buffer space. Hence, data transmission
is continued when busy status is received.

Signed-off-by: Naresh Kumar Ravulapalli <nareshkumar.ravulapalli@altera.com>
Link: https://lore.kernel.org/r/20250701044311.3670-1-nareshkumar.ravulapalli@altera.com
Signed-off-by: Michal Simek <michal.simek@amd.com>