clk: samsung: Add enable/disable operation for PLL36XX clocks

The existing enable/disable ops for PLL35XX are made more generic
and used also for PLL36XX. This fixes issues in the kernel with
PLL36XX PLLs when the PLL has not been already enabled by bootloader.

Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Tested-by: Chanwoo Choi <cw00.choi@samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>