arm64: dts: amlogic: t7: khadas-vim4: fix board model name

Update the model property to "Khadas VIM4" to match the official
product branding and maintain consistency with other Khadas boards
(e.g., VIM1, VIM2, VIM3) in the kernel tree.

Signed-off-by: Nick Xie <[email protected]>
Reviewed-by: Neil Armstrong <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Neil Armstrong <[email protected]>

Author: numbqq

arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts

@@ -8,7 +8,7 @@
 #include "amlogic-t7.dtsi"
 
 / {
-	model = "Khadas vim4";
+	model = "Khadas VIM4";
 	compatible = "khadas,vim4", "amlogic,a311d2", "amlogic,t7";
 
 	aliases {