ARM: qcom_defconfig: enable debug fs support

Enable CONFIG_DEBUG_FS since this is useful to have around.

Signed-off-by: Brian Masney <bmasney@redhat.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220311154919.1797920-3-bmasney@redhat.com