modinfo: match more standard module fields and fix version field

modinfo: match more standard module fields and fix version field

Previously, -F version could match the srcversion= string.

before :
  ~ # modinfo -F version tiwlan_drv
  version:        6.1.2012.05.29
  version:        533BB7E5866E52F63B9ACCB
  version:        0x%x, oui=0x%x, 0x%x, 0x%x
  version:        0x%x

  ~ # modinfo tiwlan_drv
  filename:       tiwlan_drv.ko
  author:         Texas Instruments Inc - Retouched by CyanogenDefy
  license:        GPL
  vermagic:       2.6.32.9 preempt mod_unload ARMv7
  parm:           g_sdio_debug_level:debug level
  depends:

now :
  ~ # modinfo -F version tiwlan_drv
  version:        6.1.2012.05.29

  ~ # modinfo tiwlan_drv
  filename:       tiwlan_drv.ko
  license:        GPL
  author:         Texas Instruments Inc - Retouched by CyanogenDefy
  version:        6.1.2012.05.29
  srcversion:     533BB7E5866E52F63B9ACCB
  depends:
  uts_release:    2.6.32.9-g306944c
  vermagic:       2.6.32.9 preempt mod_unload ARMv7
  parm:           g_sdio_debug_level:debug level

This patch also add support for the old "-n" and some other helpers

Change-Id: Icb4e9ca513cbce46b075a6f038799a7a19fb7e22
Signed-off-by: Tanguy Pruvot <tanguy.pruvot@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>