[Style] Coding style fixes.

* No trailing white spaces
 * No sapces before tabs
 * "int *var" and not "int * var"

include/libopencm3/stm32/common/crypto_common_f24.h

@@ -286,6 +286,7 @@ END_DECLS
 #endif
 /** @cond */
 #else
-#warning "crypto_common_f24.h should not be included explicitly, only via crypto.h"
+#warning "crypto_common_f24.h should not be included explicitly, "
+	 "only via crypto.h"
 #endif
 /** @endcond */