fix: pd-mapper can't read zstd firmware files

nixos unstable and 24.05 switched to zstd compression for firmware
files. Roll back to the previous setup of creating a package of the
qcom firmware uncompressed, and patching pd-mapper.

closes #14

packages/pd-mapper/pd-mapper-firmware-path.diff

@@ -4,10 +4,10 @@ index 65c4b80..669d9a0 100644
 +++ b/pd-mapper.c
 @@ -194,7 +194,7 @@ static int pd_load_map(const char *file)
  }
- 
+
  #ifndef ANDROID
 -#define FIRMWARE_BASE	"/lib/firmware/"
-+#define FIRMWARE_BASE	"/run/current-system/firmware/"
++#define FIRMWARE_BASE	"/run/current-system/sw/share/uncompressed-firmware/"
  #else
  #define FIRMWARE_BASE	"/vendor/firmware/"
  #endif