ARM: dts: sti: add the spinor controller node within stih407-family

The STiH407 family (and further versions STiH410/STiH418) embedded
a serial flash controller allowing fast access to SPI-NOR.
This commit adds the corresponding node, relying on the st-spi-fsm
drivers.

Signed-off-by: Alain Volmat <[e-mail]>
Reviewed-by: Patrice Chotard <[e-mail]>
Signed-off-by: Patrice Chotard <[e-mail]>

arch/arm/boot/dts/stih407-family.dtsi

···
 			st,lpc-mode = <ST_LPC_MODE_CLKSRC>;
 		};
 
+		spifsm: spifsm@9022000{
+			compatible = "st,spi-fsm";
+			reg = <0x9022000 0x1000>;
+			reg-names = "spi-fsm";
+			clocks = <&clk_s_c0_flexgen CLK_FLASH_PROMIP>;
+			clock-names = "emi_clk";
+			pinctrl-names = "default";
+			pinctrl-0 = <&pinctrl_fsm>;
+			st,syscfg = <&syscfg_core>;
+			st,boot-device-reg = <0x8c4>;
+			st,boot-device-spi = <0x68>;
+
+			status = "disabled";
+		};
+
 		sata0: sata@9b20000 {
 			compatible = "st,ahci";
 			reg = <0x9b20000 0x1000>;