wireless: rework regulatory domain dependencies depending on the platform

Starting with Linux v4.15, regulatory domains are no longer handled via CRDA,
but via the kernel and a flexible database instead. Said database is included
in the wireless-regdb-static package, which conflicts with the old
wireless-regdb package.

To accomodate for this new package, add CRDA as a dependency for ccimx6
platforms only, and incorporate wireless-regdb-static for the rest of the
platforms. Additionally, the ccimx6 kernel should inherit the
kernel_wireless_regdb .bbclass so the plaintext database is copied to the
kernel sources, but since we use the same recipe for all kernel versions and
ccimx6 platforms are not yet supported in zeus, omit this change for now.

Remove the package-base .bbappend, since only ccimx6ulstarter images include
that packagegroup and they require wireless-regdb-static, anyway.

By adding the regulatory database, we avoid delays when going to suspend,
caused by the kernel waiting for the database to appear.

https://jira.digi.com/browse/DEL-7133

Signed-off-by: Gabriel Valcazar <gabriel.valcazar@digi.com>

meta-digi-arm/recipes-core/packagegroup/packagegroup-base.bbappend

@@ -1,4 +0,0 @@
-# Copyright (C) 2020 Digi International.
-
-# wireless-regdb-static conflicts with wireless-regdb required by crda
-RDEPENDS_packagegroup-base-wifi_remove = "wireless-regdb-static"

meta-digi-dey/recipes-connectivity/packagegroups/packagegroup-dey-wireless.bb

@@ -7,12 +7,14 @@ PACKAGE_ARCH = "${MACHINE_ARCH}"
 inherit packagegroup
 
 RDEPENDS_${PN} = "\
-    crda \
     hostapd \
     iw \
+    wireless-regdb-static \
     wpa-supplicant \
     wpa-supplicant-cli \
     wpa-supplicant-passphrase \
 "
 
 RDEPENDS_${PN}_remove_ccimx6sbc = "hostapd"
+RDEPENDS_${PN}_remove_ccimx6 = "wireless-regdb-static"
+RDEPENDS_${PN}_append_ccimx6 = " crda"