feat: add RK3588S2 SPI U-Boot

Signed-off-by: ZHANG Yuntian <[email protected]>

u-boot/rknext/fork.conf

@@ -6,6 +6,7 @@ SUPPORTED_BOARDS=(
     #"rock-pi-e"
     "rock-2a"
     "rock-5-itx" "rock-5a" "rock-5b" "rock-5b-plus" "rock-5c" "rock-5d"
+    "rock-5a-spi" "rock-5c-spi" "rock-5d-spi"
     "radxa-nx5-io"
     "radxa-cm5-io" "radxa-cm5-rpi-cm4-io"
     "radxa-e25" "radxa-cm3i-io"
@@ -53,6 +54,10 @@ bsp_rock-5a() {
     bsp_rk3588s
 }
 
+bsp_rock-5a-spi() {
+    bsp_rk3588s
+}
+
 bsp_rock-5b-plus() {
     bsp_rk3588
 }
@@ -65,10 +70,18 @@ bsp_rock-5c() {
     bsp_rk3588s
 }
 
+bsp_rock-5c-spi() {
+    bsp_rk3588s
+}
+
 bsp_rock-5d() {
     bsp_rk3588s
 }
 
+bsp_rock-5d-spi() {
+    bsp_rk3588s
+}
+
 bsp_radxa-nx5-io() {
     bsp_rk3588s
 }