boards: riscv: add I2C Controllers to PolarFire SoC Icicle board

Microchip's PolarFire SoC contains two identical I2C peripherals in the
microprocessor subsystem. Enable both by default.

Signed-off-by: Conor Paxton <conor.paxton@microchip.com>

boards/riscv/mpfs_icicle/mpfs_icicle.dts

@@ -14,6 +14,8 @@
 	aliases {
 		led0 = &led0;
 		sw0 = &sw0;
+		i2c0 = &i2c0;
+		i2c1 = &i2c1;
 	};
 
 	chosen {
@@ -60,3 +62,11 @@
 &gpio2 {
 	status = "okay";
 };
+
+&i2c0 {
+	status = "okay";
+};
+
+&i2c1 {
+	status = "okay";
+};

boards/riscv/mpfs_icicle/mpfs_icicle_defconfig

@@ -18,3 +18,4 @@ CONFIG_SYS_CLOCK_TICKS_PER_SEC=1000
 CONFIG_FPU=n
 # GPIO driver options
 CONFIG_GPIO=y
+CONFIG_I2C=y