sunxi: Kconfig: Unify sunxi Kconfig code

Unify the sunxi Kconfig code, instead of having separate code blocks for
each of sun4i - sun7i.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
diff --git a/board/sunxi/Kconfig b/board/sunxi/Kconfig
index 552fce8..9892a34 100644
--- a/board/sunxi/Kconfig
+++ b/board/sunxi/Kconfig
@@ -1,33 +1,11 @@
-if TARGET_SUN4I
-
-config SYS_CONFIG_NAME
-	default "sun4i"
-
-endif
-
-if TARGET_SUN5I
-
-config SYS_CONFIG_NAME
-	default "sun5i"
-
-endif
-
-if TARGET_SUN6I
+if TARGET_SUN4I || TARGET_SUN5I || TARGET_SUN6I || TARGET_SUN7I
 
 config SYS_CONFIG_NAME
 	string
-	default "sun6i"
-
-endif
-
-if TARGET_SUN7I
-
-config SYS_CONFIG_NAME
-	default "sun7i"
-
-endif
-
-if TARGET_SUN4I || TARGET_SUN5I || TARGET_SUN6I || TARGET_SUN7I
+	default "sun4i" if TARGET_SUN4I
+	default "sun5i" if TARGET_SUN5I
+	default "sun6i" if TARGET_SUN6I
+	default "sun7i" if TARGET_SUN7I
 
 config SYS_CPU
 	default "armv7"