According to USI v2 driver change[1], serial_0 node should be converted to
use the USI node hierarchy. syscon_peric0 will be used as a syscon node
to control the USI00_USI_SW_CONF register.
This also changes the serial node name from uart@ to serial@.

[1]: https://lore.kernel.org/linux-samsung-soc/20211204195757.8600-2-semen.protsenko@linaro.org/ (local)

Cc: Sam Protsenko <semen.protsenko@linaro.org>
Signed-off-by: Chanho Park <redacted>
---
 .../boot/dts/exynos/exynosautov9-sadk.dts     |  4 +++
 arch/arm64/boot/dts/exynos/exynosautov9.dtsi  | 36 ++++++++++++++-----
 2 files changed, 32 insertions(+), 8 deletions(-)

diff --git a/arch/arm64/boot/dts/exynos/exynosautov9-sadk.dts b/arch/arm64/boot/dts/exynos/exynosautov9-sadk.dts
index ef46d7aa6e28..6cc903443809 100644
--- a/arch/arm64/boot/dts/exynos/exynosautov9-sadk.dts
+++ b/arch/arm64/boot/dts/exynos/exynosautov9-sadk.dts

@@ -41,6 +41,10 @@ ufs_0_fixed_vcc_reg: regulator-0 {
 	};
 };
 
+&usi_0 {
+	status = "okay";
+};
+