include/boot: Move zipl/boot/error.h to include/boot

- Move zipl/boot/error.h to include/boot
- Adjust include statements in zipb/boot and genprotimg/boot
- Remove error.h from tunedasd/src/tunedasd.c as not needed
- Fix tunedasd/src/Makefile

Signed-off-by: Mikhail Zaslonko <zaslonko@linux.ibm.com>
Reviewed-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>

tunedasd/src/Makefile

@@ -1,6 +1,6 @@
 include ../../common.mak
 
-ALL_CPPFLAGS += -I../include -I../boot
+ALL_CPPFLAGS += -I../include
 
 libs =	$(rootdir)/libdasd/libdasd.a \
 	$(rootdir)/libutil/libutil.a

tunedasd/src/tunedasd.c

@@ -20,7 +20,6 @@
 #include "lib/zt_common.h"
 
 #include "disk.h"
-#include "error.h"
 #include "tunedasd.h"
 
 static const struct util_prg prg = {