OvmfPkg/IoMmuDxe: IoMmuFreeBuffer(): clean up DEBUG message
OvmfPkg/IoMmuDxe: IoMmuFreeBuffer(): clean up DEBUG message

Log all relevant IN parameters on entry. (There are only IN parameters.)
Beautify the format string.

Cc: Brijesh Singh <6c1ba716601dd19ee463759bfdaf6de1e69b2b21@amd.com>
Cc: Jordan Justen <a79006884ba9cf5f4f7fcbb92a15b208780d8c97@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Laszlo Ersek <7437296077edea1cb64451c122c4dac071f0cfbc@redhat.com>
Reviewed-by: Brijesh Singh <6c1ba716601dd19ee463759bfdaf6de1e69b2b21@amd.com>
Tested-by: Brijesh Singh <6c1ba716601dd19ee463759bfdaf6de1e69b2b21@amd.com>

MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2