hmp: Name HMP info handler functions hmp_info_SUBCOMMAND()

Some are called do_info_SUBCOMMAND() (old ones, usually), some
hmp_info_SUBCOMMAND(), some SUBCOMMAND_info(), sometimes SUBCOMMAND
pointlessly differs in spelling.

Normalize to hmp_info_SUBCOMMAND(), where SUBCOMMAND is exactly the
subcommand name with '-' replaced by '_'.

Exceptions:

* sun4m_irq_info(), sun4m_pic_info() renamed to sun4m_hmp_info_irq(),
  sun4m_hmp_info_pic().

* lm32_irq_info(), lm32_pic_info() renamed to lm32_hmp_info_irq(),
  lm32_hmp_info_pic().

Signed-off-by: Markus Armbruster <armbru@redhat.com>
diff --git a/hw/usb/bus.c b/hw/usb/bus.c
index 986b2d8..677122e 100644
--- a/hw/usb/bus.c
+++ b/hw/usb/bus.c
@@ -627,7 +627,7 @@
     return fw_path;
 }
 
-void usb_info(Monitor *mon, const QDict *qdict)
+void hmp_info_usb(Monitor *mon, const QDict *qdict)
 {
     USBBus *bus;
     USBDevice *dev;