ARM: multi_v7_defconfig: Cleanup from non-existing options

Remove options which do not exist anymore:
 - TEGRA_EMC_SCALING_ENABLE is gone since commit cab4d503 ("ARM:
   tegra: remove TEGRA_EMC_SCALING_ENABLE");

 - ARCH_VEXPRESS_CA9X4 is gone since commit 81cc3f86
   ("ARM: vexpress: Remove non-DT code");

 - OMAP_USB3 was replaced by TI_PIPE3 in commit a70143bb ("drivers:
   phy: usb3/pipe3: Adapt pipe3 driver to Generic PHY Framework");

 - MMC_DW_IDMAC is gone since commit 3fc7eaef ("mmc: dw_mmc: Add
   external dma interface support");

 - QCOM_SMD since commit 395a4805 ("soc: qcom: smd: Remove
   standalone driver");

 - COMMON_CLK_MAX77802 was merged into COMMON_CLK_MAX77686 in commit
   8ad313fe ("clk: max77686: Combine Maxim max77686 and max77802
   driver");

 - CRYPTO_DEV_TEGRA_AES is gone since commit 645af2e4 ("crypto:
   tegra - remove driver");

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>