ACPI: Add ACPI_Q_AEI_NOPULL quirk and use in EC2

AWS Graviton [1234] systems have a bug in their ACPI where they mark
the PL061's GPIO pins as needing to be configured in PullUp mode (in
fact the PL061 has no pullup/pulldown resistors); this flag needs to
be removed in order for _AEI objects to be handled on these systems.

Reviewed by:	Ali Saidi
Approved by:	re (kib)
MFC after:	1 week
Sponsored by:	Amazon
Differential Revision:	https://reviews.freebsd.org/D47239

(cherry picked from commit 2f3f867ac6dd7ff3769366b828b79c44b38828e1)
(cherry picked from commit 5fa51c3653)

release/tools/ec2.conf

@@ -63,6 +63,11 @@ ec2_common() {
 	# nodes, but apply the workaround just in case.
 	echo 'hw.broken_txfifo="1"' >> ${DESTDIR}/boot/loader.conf
 
+	# Graviton 1 through Graviton 4 have a bug in their ACPI where they
+	# mark the PL061's pins as needing to be configured in PullUp mode
+	# (in fact the PL061 has no pullup/pulldown resistors).
+	echo 'debug.acpi.quirks="8"' >> ${DESTDIR}/boot/loader.conf
+
 	# Load the kernel module for the Amazon "Elastic Network Adapter"
 	echo 'if_ena_load="YES"' >> ${DESTDIR}/boot/loader.conf
 

sys/dev/acpica/acpivar.h

@@ -224,12 +224,15 @@ extern struct mtx			acpi_mutex;
  * ACPI_Q_MADT_IRQ0: Specifies that ISA IRQ 0 is wired up to pin 0 of the
  *	first APIC and that the MADT should force that by ignoring the PC-AT
  *	compatible flag and ignoring overrides that redirect IRQ 0 to pin 2.
+ * ACPI_Q_AEI_NOPULL: Specifies that _AEI objects incorrectly designate pins
+ *	as "PullUp" and they should be treated as "NoPull" instead.
  */
 extern int	acpi_quirks;
 #define ACPI_Q_OK		0
 #define ACPI_Q_BROKEN		(1 << 0)
 #define ACPI_Q_TIMER		(1 << 1)
 #define ACPI_Q_MADT_IRQ0	(1 << 2)
+#define ACPI_Q_AEI_NOPULL	(1 << 3)
 
 #if defined(__amd64__) || defined(__i386__)
 /*