ARM: dts: stm32: fix i2c node name on stm32f746 to prevent warnings

stable inclusion
from stable-5.10.53
commit 6a7af634781088be5ce9b673af487f2337f0cb90
bugzilla: 175574 https://gitee.com/openeuler/kernel/issues/I4DTUX

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=6a7af634781088be5ce9b673af487f2337f0cb90

--------------------------------

[ Upstream commit ad0ed10b ]

Replace upper case by lower case in i2c nodes name.
Signed-off-by: NAlexandre Torgue <alexandre.torgue@foss.st.com>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Acked-by: NWeilong Chen <chenweilong@huawei.com>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

arch/arm/boot/dts/stm32f746.dtsi

@@ -360,9 +360,9 @@
 			status = "disabled";
 		};
 
-		i2c3: i2c@40005C00 {
+		i2c3: i2c@40005c00 {
 			compatible = "st,stm32f7-i2c";
-			reg = <0x40005C00 0x400>;
+			reg = <0x40005c00 0x400>;
 			interrupts = <72>,
 				     <73>;
 			resets = <&rcc STM32F7_APB1_RESET(I2C3)>;