brcmfmac: remove unnecessary strlcpy() upon obtaining "ver" iovar

Recently a strcpy() was replaced by strlcpy(). However, the strcpy()
was not needed in the first place. So removing that line of code.

Reviewed-by: Hante Meuleman <hante.meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>
Reviewed-by: Franky Lin <franky.lin@broadcom.com>
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>