qcacmn: Add command support for UL PPDU duration

Add the WMI PDEV param 'wmi_pdev_param_ul_ppdu_duration' to
add command support to modify the UL PPDU duration.

Change-Id: If2f8ef02d4f992d91fa745599d5c08b1dfccceca
CRs-fixed: 2393139
3 files changed