encrypted-storage: use luks as the feature name for current implementation

encrypted-storage layer will include more security features about encrypted
storage so the term "encrypted-storage" won't be used to specify a dedicated
technology term such as "LUKS".

Signed-off-by: Jia Zhang <lans.zhang2008@gmail.com>

meta-encrypted-storage/recipes-base/packagegroups/packagegroup-encrypted-storage-initramfs.bb

@@ -1,8 +0,0 @@
-DESCRIPTION = "The packages used for encrypted storage in initramfs."
-
-require packagegroup-encrypted-storage.inc
-
-RDEPENDS_${PN} += "\
-    cryptfs-tpm2-initramfs \
-    packagegroup-tpm2-initramfs \
-"

meta-encrypted-storage/recipes-base/packagegroups/packagegroup-luks-initramfs.bb

@@ -0,0 +1,8 @@
+DESCRIPTION = "The packages used for luks in initramfs."
+
+require packagegroup-luks.inc
+
+RDEPENDS_${PN} += "\
+    cryptfs-tpm2-initramfs \
+    packagegroup-tpm2-initramfs \
+"

meta-encrypted-storage/recipes-base/packagegroups/packagegroup-luks.bb

@@ -1,6 +1,6 @@
-DESCRIPTION = "The packages used for encrypted storage."
+DESCRIPTION = "The packages used for LUKS."
 
-require packagegroup-encrypted-storage.inc
+require packagegroup-luks.inc
 
 # Install the minimal stuffs only for the linux rootfs.
 # The common packages shared between initramfs and rootfs