soc: atmel: samx7x: implement main oscillator bypass mode

	  Says n here will use the internal fast RC oscillator running at 12 MHz.

config SOC_ATMEL_SAM_EXT_MAINCK_BYPASS

	bool "Use bypass mode for external crystal oscillator"

	depends on SOC_ATMEL_SAM_EXT_MAINCK

	help

	  When bypass mode is enabled, the external crystal oscillator is bypassed,

	  and the main clock is directly driven by an external clock signal.

	  Says y here if you want to use an external clock signal directly instead

	  of the crystal oscillator.

	  Says n here to use the external crystal oscillator normally.

menu "PLL A"

config SOC_ATMEL_SAM_PLLA_MULA

		 * this optimization is not deemed

		 * critical now.

		 */

		soc_pmc_switch_mainck_to_xtal(false, 0xff);

		bool bypass = IS_ENABLED(CONFIG_SOC_ATMEL_SAM_EXT_MAINCK_BYPASS);

		soc_pmc_switch_mainck_to_xtal(bypass, 0xff);

	}

	/*