ARM: multi_v7_defconfig: Add DRM_MSM to defconfigs with ARCH_QCOM

Now that CONFIG_DRM_MSM is no longer default 'y' add it as a module to all
ARCH_QCOM enabled defconfigs to restore the previous expected build
behavior.

I split this off from the original patch to make this change unique to
the multi_v7_defconfig

Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Andy Gross <agross@kernel.org>