d/patches: Add patches to enable unsolicited signal strength indication

Without that, ModemManager resorts to battery unfriendly periodic polling.
4 jobs for update-1.14.8 in 17 minutes and 34 seconds
Status Job ID Name Coverage
  Package
passed #310096
librem5
package-debian-buster

00:04:49

passed #310097
librem5:arm64
package-debian-buster:arm64

00:15:56

 
  Test Package
passed #310098
librem5
autopkgtest-debian-buster-package

00:00:46

passed #310099
librem5
lintian-debian-buster-package

00:00:50