[l1] fix whitespace and missing license info

Earlier additions to the L1 support were not correctly using linux
coding guidelines as specified in /HACKING.

Some examples were also missing license information.

examples/stm32/l1/stm32l-discovery/button-irq-printf/syscfg.h

@@ -1,7 +1,20 @@
 /*
- * General configuration of the device
+ * This file is part of the libopencm3 project.
  *
- * Karl Palsson <karlp@tweak.net.au> 2012
+ * Copyright (C) 2012 Karl Palsson <karlp@tweak.net.au>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #ifndef SYSCFG_H
@@ -31,10 +44,9 @@ extern "C" {
 #define BUTTON_DISCO_USER_isr exti0_isr
 #define BUTTON_DISCO_USER_NVIC NVIC_EXTI0_IRQ
 
-
-    struct state_t {
-        bool falling;
-    };
+	struct state_t {
+		bool falling;
+	};
 
 
 #ifdef	__cplusplus