MAINTAINERS: Add Frank Li to Silvaco I3C

Add Frank Li as NXP i3c controller driver as maintainer and add mail list
imx@lists.linux.dev for it.

Add Frank Li as I3C subsystem reviewer.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20240815141609.4089406-1-Frank.Li@nxp.com


Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>