dts: change all txlx/axg/g12a/g12b dts to use spicc upstream driver.

dts: change all txlx/axg/g12a/g12b dts to use spicc upstream driver.

PD#164751: dts: change all txlx/axg/g12a/g12b dts to use spicc upstream driver.

1. change to use the unified name "spicc0/1".
2. change axg compatible from "amlogic, spicc" to "amlogic,meson-axg-spicc"
   to use upstream driver.
3. change txlx compatible from "amlogic, spicc" to "amlogic,meson-txlx-spicc"
   to use upstream driver.
3. change g12a compatible from "amlogic, spicc" to "amlogic,meson-g12a-spicc"
   to use upstream driver.
4. add node of "amlogic,meson-g12b-spicc" for g12b to use upstream driver.

Change-Id: I587127361fa2ada48332cc01857f2200709d597e
Signed-off-by: Sunny Luo <sunny.luo@amlogic.com>