scripts/tags.sh: Teach tags about more powerpc macros

Teach tags.sh about the powerpc PCI macros, eg. readl/writel etc.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Michal Marek <mmarek@suse.com>

scripts/tags.sh

@@ -200,6 +200,7 @@ exuberant()
 	--regex-c++='/TASK_PFA_CLEAR\([^,]*,\s*([^)]*)\)/task_clear_\1/'\
 	--regex-c++='/DEF_MMIO_(IN|OUT)_(X|D)\(([^,]*),\s*[^)]*\)/\3/'	\
 	--regex-c++='/DEBUGGER_BOILERPLATE\(([^,]*)\)/\1/'		\
+	--regex-c++='/DEF_PCI_AC_(NO)?RET\(([^,]*),.*/\2/'		\
 	--regex-c='/PCI_OP_READ\((\w*).*[1-4]\)/pci_bus_read_config_\1/' \
 	--regex-c='/PCI_OP_WRITE\((\w*).*[1-4]\)/pci_bus_write_config_\1/' \
 	--regex-c='/DEFINE_(MUTEX|SEMAPHORE|SPINLOCK)\((\w*)/\2/v/'	\