arm64: defconfig: Enable more IP blocks for Exynos7 and Exynos5433

Enable more drivers for IP blocks for existing Exynos7 and upcoming
Exynos5433:
1. SPI,
2. Watchdog,
3. USB: DWC3, Exynos EHCI and OHCI,
4. Exynos ADC,
5. Samsung PWM.

These are already used by Exynos7 Espresso board or will be used by
Exynos5433 based board.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>