package/flashrom: bump to version 1.2

package/flashrom: bump to version 1.2

- Drop patch (not needed since
  https://github.com/flashrom/flashrom/commit/e0ceedf76d48757a05f22860e7ddd03e430c2252)
- CONFIG_ENABLE_LIBUSB0_PROGRAMMERS has been dropped since
  https://github.com/flashrom/flashrom/commit/b221cd7048f9cde1fe789e686a0e0adaf9a688b3
- arc platform is supported since
  https://github.com/flashrom/flashrom/commit/34d07f00b2990bec4a2ce12852acd42c08ddf217
- Update indentation in hash file (two spaces)

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>