genirq/msi: Clean up usage of __u8/__u16 types

The double underscore types are meant for compatibility in userspace
headers which does not apply here. Therefore, change to use the standard
no-underscore types.

The origin of the double underscore types dates back to before the git era
so I was not able to find a commit to see the original justification.
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

include/linux/msi.h

@@ -83,12 +83,12 @@ struct msi_desc {
 		struct {
 			u32 masked;
 			struct {
-				__u8	is_msix		: 1;
-				__u8	multiple	: 3;
-				__u8	multi_cap	: 3;
-				__u8	maskbit		: 1;
-				__u8	is_64		: 1;
-				__u16	entry_nr;
+				u8	is_msix		: 1;
+				u8	multiple	: 3;
+				u8	multi_cap	: 3;
+				u8	maskbit		: 1;
+				u8	is_64		: 1;
+				u16	entry_nr;
 				unsigned default_irq;
 			} msi_attrib;
 			union {