riscv: dts: spacemit: add i2c aliases on Milk-V Jupiter

Add i2c aliases for i2c2 and i2c8 on Milk-V Jupiter. This is useful to
keep a stable number for the /dev entries after loading the i2c-dev
module.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Yixun Lan <dlan@kernel.org>
Link: https://lore.kernel.org/r/20260326183745.1370642-4-aurelien@aurel32.net
Signed-off-by: Yixun Lan <dlan@kernel.org>

Author: aurel32

arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts

@@ -15,6 +15,8 @@
 		ethernet0 = &eth0;
 		ethernet1 = &eth1;
 		serial0 = &uart0;
+		i2c2 = &i2c2;
+		i2c8 = &i2c8;
 	};
 
 	chosen {