Draft: BL i.MX93 LVDS support

This MR contains the second part of fixes, which are specific to Linux kernel, to make LVDS work and to be auto detected.

Following changes are included in this MR:

• a 350MHz frequency for iMX93 PLL was added
• commits from iMX8MP kernel, which provide support for lcdif and ldb functionality, were adopted
• added an initial overlay with LVDS support
• moved GPIO pinmuxes, which are used by LVDS, from base dtsi to the created overlay

Notes:

• touch screen did not work on available displays, so TS functionality was not tested
• as TS did not work, it was not possible to determine which display is connected, so an overlay for specific display was manually activated in U-Boot

meta-ked-bsp MR: sw/ked/meta-ked-bsp!98 (closed)