Fix some make checkcodebase errors

- Reorder checkpatch ignore flags alphabetically
- Fix checkpatch WARNINGs and CHECKs when they make sense
- Add more checkpatch ignores

src/link/output.c

@@ -9,7 +9,7 @@
 
 #include "extern/err.h"
 
-FILE *outputFile;
+FILE * outputFile;
 FILE *overlayFile;
 FILE *symFile;
 FILE *mapFile;
@@ -357,9 +357,8 @@ static void writeSymAndMap(void)
 	symFile = openFile(symFileName, "w");
 	mapFile = openFile(mapFileName, "w");
 
-	if (symFileName) {
+	if (symFileName)
 		fputs("; File generated by rgblink\n", symFile);
-	}
 
 	for (uint8_t i = 0; i < SECTTYPE_INVALID; i++) {
 		enum SectionType type = typeMap[i];

src/link/script.c

@@ -11,7 +11,7 @@
 
 #include "extern/err.h"
 
-FILE *linkerScript;
+FILE * linkerScript;
 
 static uint32_t lineNo;