ARM: dts: clps711x: Add SYSCON nodes where it is used

This patch adds SYSCON descriptors to framebuffer, SPI, DAI
and modem control GPIO nodes to further rework these drivers
to remove the call to the syscon_regmap_lookup_by_compatible() function.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Link: https://lore.kernel.org/r/20210405051658.26779-1-shc_work@mail.ru

'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>