serial: qcom-geni: Load UART qup Firmware from linux side

serial: qcom-geni: Load UART qup Firmware from linux side

Add provision to load firmware of Serial engine for UART protocol from
Linux Execution Environment on running on APPS processor.

Co-developed-by: Mukesh Kumar Savaliya <mukesh.savaliya@oss.qualcomm.com>
Signed-off-by: Mukesh Kumar Savaliya <mukesh.savaliya@oss.qualcomm.com>
Signed-off-by: Viken Dadhaniya <viken.dadhaniya@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250911043256.3523057-7-viken.dadhaniya@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>