Railroad fix (#10935)

* Fix Railroad build issues

* Update keyboards/nopunin10did/railroad/rev0/rules.mk

* Update keyboards/nopunin10did/railroad/rev0/rev0.h

* Add extra copy of readme to the rev0 folder

* Update keyboards/nopunin10did/railroad/rev0/readme.md

keyboards/nopunin10did/railroad/readme.md

@@ -10,6 +10,6 @@ A long keyboard with ortholinear alphas and semi-standard modifier keys. For mor
 
 Make example for this keyboard (after setting up your build environment):
 
-    make nopunin10did/railroad:default
+    make nopunin10did/railroad/rev0:default
 
 See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).

keyboards/nopunin10did/railroad/rev0/readme.md

@@ -0,0 +1,15 @@
+# The Railroad
+
+![The Railroad](https://i.imgur.com/B8OjXmyl.jpg)
+
+A long keyboard with ortholinear alphas and semi-standard modifier keys. For more information, join the [NoPunIn10Key Discord](https://discord.gg/sku2Y6w).
+
+* Keyboard Maintainer: [Alex Ronke](https://diplomacyvariants.wordpress.com/), also known as [NoPunIn10Did](https://github.com/nopunin10did). 
+* Hardware Supported: The Railroad: 2020-07 Prototype
+* Hardware Availability: Currently by request only
+
+Make example for this keyboard (after setting up your build environment):
+
+    make nopunin10did/railroad/rev0:default
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).

keyboards/nopunin10did/railroad/rev0/railroad.c → keyboards/nopunin10did/railroad/rev0/rev0.c

@@ -14,4 +14,4 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include "railroad.h"
+#include "rev0.h"

keyboards/nopunin10did/railroad/rev0/railroad.h → keyboards/nopunin10did/railroad/rev0/rev0.h

@@ -49,5 +49,3 @@
    { K0800, K0801, K0802, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, K0808, K0809, K0810 }, \
    { K0900, K0901, K0902, K0903, K0904, K0905, K0906, K0907, K0908, K0909, KC_NO }  \
 }
-
-