linux-postmarketos-exynos5: update to 6.6.59

Two main changes apart from rebase and config sync:

• Fix broken usb networking by making CONFIG_USB_CDC_COMPOSITE builtin (by @Eisenbahnfan)
• Add mainline support for exynos5420-n2awifi (by @Eisenbahnfan)

Tested on odroid-xu4 and samsung-klimtlte. I planned to test on samsung-manta as well, but seems battery is too deep-discharged on that one.. Since this is essentially a minor update (6.6.41 -> 6.6.59) I am not too worried and think that testing on two devices should be enough.

device/community/linux-postmarketos-exynos5/APKBUILD

@@ -4,8 +4,8 @@
 # and Hardkernel's odroidxu4_defconfig
 
 pkgname=linux-postmarketos-exynos5
-pkgver=6.6.41
-pkgrel=3
+pkgver=6.6.59
+pkgrel=0
 pkgdesc="Mainline kernel fork for Samsung Exynos5 devices"
 arch="armv7"
 _carch="arm"
@@ -69,6 +69,6 @@ package() {
 }
 
 sha512sums="
-f82cebbe5683baca5f1e2f7c51d3132d84e52dc553170ed21229b8c2e3d46aa5abd06b5059f8fc336034d39a9040ad96b35c704f6d027b8cd32ead0f3d9e6036  linux-postmarketos-exynos5-v6.6.41-exynos5-lts.tar.bz2
-7c35ceb606c2eb8af6e9f594d61f2cf055488bfd788602ee000da6575bb7c9cae3d6be93ebb0d2f8371acc5f357990c35e0f53bb5c597b6fc6c972a0f68bb6a4  config-postmarketos-exynos5.armv7
+db6976d67236b2612c7dcbb201c1f0cad403358418cf359ec9a5e02eeeaa01aebb812eaa575ff7f986e3123e9a971bfe8587dc4ce1be750a88490644dcfe9545  linux-postmarketos-exynos5-v6.6.59-exynos5-lts.tar.bz2
+5cfee4cfbe30afeacf467a8db4dc98321e12a58bf9a2d55b8fd81a943b3c7bab4bbb88e115000636f83ae8d848fbb964dc20683f02b20c5e14b79f829d0cfda1  config-postmarketos-exynos5.armv7
 "