remove conditional logic for ctrl_dir and ocp_dir size

Remove conditional logic for kernel version to determine the
size of ctrl_dir and ocp_dir.  Instead, the maximum possible
size is used for these arrays regardless of the kernel version

Resolves #144

Author: pdp7

source/common.c

@@ -55,13 +55,8 @@ SOFTWARE.
 int gpio_mode;
 int gpio_direction[120];
 
-#ifdef BBBVERSION41
 char ctrl_dir[43];
 char ocp_dir[33];
-#else
-char ctrl_dir[35];
-char ocp_dir[25];
-#endif
 
 int setup_error = 0;
 int module_setup = 0;

source/common.h

@@ -64,13 +64,8 @@ typedef struct pwm_t {
 extern int gpio_mode;
 extern int gpio_direction[120];
 
-#ifdef BBBVERSION41
-  extern char ctrl_dir[43];
-  extern char ocp_dir[33];
-#else
-  extern char ctrl_dir[35];
-  extern char ocp_dir[25];
-#endif
+extern char ctrl_dir[43];
+extern char ocp_dir[33];
 
 BBIO_err get_gpio_number(const char *key, unsigned int *gpio);
 BBIO_err get_pwm_key(const char *input, char *key);