dts: can: mcux: flexcan: Add number-of-mb property to FlexCAN nodes

Add the `number-of-mb` and `number-of-mb-fd` device tree property to
all the NXP FlexCAN controller nodes across various SoC families to
specify the maximum number of 8-byte and 64-byte payload message
buffers supported by each FlexCAN instance.

This change updates device tree source files for multiple NXP SoC
families including Kinetis K6x, RT10xx, RT11xx, RT118x, MCX, S32K,
S32Z, and i.MX8MP/i.MX93 series. The property values are set based
on hardware specifications for each specific FlexCAN instance.

This property addition ensures proper resource allocation and
prevents buffer overflow issues in FlexCAN driver implementations.

Signed-off-by: William Tang <william.tang@nxp.com>