xps-15-7590: convert wiki to markdown.

This allows it to symlink it in the README

dell/xps/15-7590/README.wiki → dell/xps/15-7590/README.md

@@ -1,28 +1,28 @@
-= Dell XPS 15 7590 =
-*Mostly copied from 15-9550
+# Dell XPS 15 7590
+- Mostly copied from 15-9550
 
-== Tested Hardware ==
+## Tested Hardware
 
-* CPU: Intel(R) Core(TM) i9-9980HK
-* RAM: 32 GB
-* HDD: 1 TiB SSD
-* Screen: 15" 4k (3840✕2160)
-* Input: Touchscreen and trackpad.
+- CPU: Intel(R) Core(TM) i9-9980HK
+- RAM: 32 GB
+- HDD: 1 TiB SSD
+- Screen: 15" 4k (3840✕2160)
+- Input: Touchscreen and trackpad.
 
-== Firmware Configuration ==
+## Firmware Configuration 
 
 Not much tweaking of NixOS itself was needed. But we currently cannot automate the firmware setup, so this must be done by hand.
 
-=== Before installation ===
+### Before installation
 
 These settings are needed both for booting the final install, and installer itself. Therefore, they must be done first.
 
-* ''Disable Secure Boot (but keep UEFI Boot).'' Thankfully doing so is as easy as changing any other simple setting.
+- **Disable Secure Boot (but keep UEFI Boot).** Thankfully doing so is as easy as changing any other simple setting.
 
-* ''Disable Intel hardware RAID and use AHCI instead.'' Intel doesn't seem to provide a working linux driver for this.  (If you just have SSD it's pointless and just slows things down needlessly anyways.)
+- **Disable Intel hardware RAID and use AHCI instead.** Intel doesn't seem to provide a working linux driver for this.  (If you just have SSD it's pointless and just slows things down needlessly anyways.)
 
-=== Wifi ===
-~~Wifi does not work with kernels older than 5.1 (firmware not present) or newer~~ (https://bbs.archlinux.org/viewtopic.php?id=247705)
+### Wifi
+**Wifi does not work with kernels older than 5.1 (firmware not present) or newer** (https://bbs.archlinux.org/viewtopic.php?id=247705)
 
 Update: The 48.ucode causes the Killer wifi card to crash. The iwlfwifi-cc-a0-46.ucode works perfectly. default.nix contains an overlay that removes the offending ucode from the linux-firmware bundle.
 
@@ -40,13 +40,10 @@ Update: The 48.ucode causes the Killer wifi card to crash. The iwlfwifi-cc-a0-46
 Disable the `canTouchEfiVariables` after a boot or two to prevent NVRAM wearout.
 
 
-=== After installation ===
+### After installation
 
-* ''Add systemd-boot to UEFI boot list.'' The (uneditable anyways) settings mapping drive UUIDs to HD* work fine.
+- **Add systemd-boot to UEFI boot list.** The (uneditable anyways) settings mapping drive UUIDs to HD* work fine.
 
-=== Optional ===
-
-* ''Update BIOS.'' According to Reddit, this helps with battery life.
-
-=== Troubleshooting ===
+### Optional
 
+- **Update BIOS.** According to Reddit, this helps with battery life.