firmware: qcom_scm: don't opencode kmemdup

firmware: qcom_scm: don't opencode kmemdup

Lets not opencode kmemdup which is reported by coccinelle tool.
Fix it using kmemdup.

cocci warnings: (new ones prefixed by >>)
>> drivers/firmware/qcom/qcom_scm.c:916:11-18: WARNING opportunity for kmemdup

Fixes: 8b9d2050cfa0 ("firmware: qcom_scm: Add qcom_scm_pas_get_rsc_table() to get resource table")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202601142144.HvSlBSI9-lkp@intel.com/
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260310140255.2520230-1-mukesh.ojha@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>