gnu: arm-trusted-firmware-pine64-plus: Rename variable to arm-trusted-firmware-sun50i-a64.

* gnu/packages/firmware (arm-trusted-firmware-pine64-plus): Rename to...
(arm-trusted-firmware-sun50i-a64): ...this.
* gnu/packages/bootloaders (u-boot-pine64-plus)[native-inputs]: Use it.

Signed-off-by: Danny Milosavljevic <dannym@scratchpost.org>

gnu/packages/bootloaders.scm

@@ -573,7 +573,7 @@ board-independent tools.")))
                     )
                   #t))))))
       (native-inputs
-       `(("firmware" ,arm-trusted-firmware-pine64-plus)
+       `(("firmware" ,arm-trusted-firmware-sun50i-a64)
          ,@(package-native-inputs base))))))
 
 (define-public u-boot-bananapi-m2-ultra

gnu/packages/firmware.scm

@@ -446,7 +446,7 @@ such as:
     (license (list license:bsd-3
                    license:bsd-2)))) ; libfdt
 
-(define-public arm-trusted-firmware-pine64-plus
+(define-public arm-trusted-firmware-sun50i-a64
   (let ((base (make-arm-trusted-firmware "sun50i_a64"))
         ;; Use unreleased version which enables additional features needed for
         ;; LCD support
@@ -454,7 +454,7 @@ such as:
         (revision "1"))
     (package
       (inherit base)
-      (name "arm-trusted-firmware-pine64-plus")
+      (name "arm-trusted-firmware-sun50i-a64")
       (version (git-version "2.0" revision commit))
       (source
         (origin