tools: rewrite make-autosuspend-rules.py and add udev rules

Concatenating strings is not a very efficient approach. And in this case fully
unnecessary. We also need some rules to make use of those hwdb entries.

PCI needs to be 8 characters, not 4. And we need to use uppercase hexadecimal
for both. With udev rules this made no difference, but hwdb match is case
sensitive.

Fixes #16119.

rules.d/60-autosuspend.rules

@@ -0,0 +1,14 @@
+# do not edit this file, it will be overwritten on update
+
+ACTION!="add", GOTO="autosuspend_end"
+
+# I2C rules
+SUBSYSTEM=="i2c", ATTR{name}=="cyapa", \
+  ATTR{power/control}="on", GOTO="autosuspend_end"
+
+# Enable autosuspend if hwdb says so. Here we are relying on
+# the hwdb import done earlier based on MODALIAS.
+ENV{ID_AUTOSUSPEND}=="1", TEST=="power/control", \
+  ATTR{power/control}="auto"
+
+LABEL="autosuspend_end"

rules.d/meson.build

@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: LGPL-2.1+
 
 rules = files('''
+        60-autosuspend.rules
         60-block.rules
         60-cdrom_id.rules
         60-drm.rules