linux-imx

MLK-20190-03 brcmfmac: check thre return value of .brcmf_fil_iovar_data_get()

Check the return value of .brcmf_fil_iovar_data_get() to fix
the coverity issue of "error handling issue".

Reviewed-by: Haibo Chen <haibo.chen@nxp.com>
Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: Arulpandiyan Vadivel <arulpandiyan_vadivel@mentor.com>