target: less implicit inclusion of "command.h"

Lots of files still include it, often through needless
duplicate inclusion of "log.h"; sigh.

This cleans up the inclusion graph a bunch, so there are
fewer inclusion paths, but it doesn't change much otherwise.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>

src/target/armv7a.h

@@ -21,7 +21,6 @@
 
 #include "register.h"
 #include "target.h"
-#include "log.h"
 #include "arm_adi_v5.h"
 #include "armv4_5.h"
 #include "armv4_5_mmu.h"