vme: Convert documentation to reStructuredText, move under driver APIs

Perform a relatively simple conversion of vme_api.txt to reStructuredText
and move under driver-api, which seems the most logical place for this
documentation.
Signed-off-by: Martyn Welch <martyn.welch@collabora.co.uk>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/driver-api/index.rst

@@ -24,3 +24,4 @@ available subsections can be seen below.
    i2c
    hsi
    miscellaneous
+   vme

MAINTAINERS

@@ -12877,7 +12877,7 @@ M:	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 L:	devel@driverdev.osuosl.org
 S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git
-F:	Documentation/vme_api.txt
+F:	Documentation/driver-api/vme.rst
 F:	drivers/staging/vme/
 F:	drivers/vme/
 F:	include/linux/vme*