riscv: sifive/fu540: kconfig: Enable support for Opencores I2C controller

Enable support for SiFive FU540 Opencores I2C master controller.

Signed-off-by: Pragnesh Patel <pragnesh.patel@sifive.com>
Reviewed-by: Rick Chen <rick@andestech.com>
diff --git a/arch/riscv/cpu/fu540/Kconfig b/arch/riscv/cpu/fu540/Kconfig
index ac3f183..61bd5c4 100644
--- a/arch/riscv/cpu/fu540/Kconfig
+++ b/arch/riscv/cpu/fu540/Kconfig
@@ -35,6 +35,8 @@
 	imply SIFIVE_OTP
 	imply DM_PWM
 	imply PWM_SIFIVE
+	imply DM_I2C
+	imply SYS_I2C_OCORES
 
 if ENV_IS_IN_SPI_FLASH