clk: at91: sama7d65: add sama7d65 pmc driver

Add clock support for SAMA7D65 SoC.

Increase maximum number of valid master clocks. The PMC for the SAMA7D65
requires 9 master clocks.

Increase maximum amount of PLLs to 9 to support SAMA7D65 SoC PLL
requirements.

Signed-off-by: Ryan Wanner <Ryan.Wanner@microchip.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@tuxon.dev>
Link: https://lore.kernel.org/r/549fa8590fe9b4380e413f8eed87392f28754395.1734723585.git.Ryan.Wanner@microchip.com


[claudiu.beznea: sorted alphanumerically the Makefile entries, reorder
 the code for resource cleanup in sama7d65_pmc_setup()]
Signed-off-by: Claudiu Beznea <claudiu.beznea@tuxon.dev>