siteinfo: Recognize 32bit PPC LE

siteinfo: Recognize 32bit PPC LE

* since this commit, all powerpc little-endians (both 32bit and 64bit) use "le" suffix:
  commit b6ac40f1cbabb20896bf113568f7735a462ed1a6
  Author: Khem Raj <raj.khem@gmail.com>
  Date:   Sun Dec 29 10:44:03 2019 -0800

    powerpc, powerpc64: Append little-endianness to tune arch

* 64bit variants were already fixed in:
  commit e62cdb9b88b575b5cfcdd65ca558edc237c43b2a
  Author: Khem Raj <raj.khem@gmail.com>
  Date:   Sun Dec 29 10:44:02 2019 -0800

    siteinfo: Recognize 64bit PPC LE

* but 32bit are still failing:
  scripts/tune/log.fake-power5.powerpcle
  scripts/tune/log.fake-power5.powerpcle-nf
  scripts/tune/log.fake-power6.powerpcle
  scripts/tune/log.fake-power6.powerpcle-nf
  scripts/tune/log.fake-power7.powerpcle
  scripts/tune/log.fake-power7.powerpcle-nf
  scripts/tune/log.fake-power9.powerpcle
  scripts/tune/log.fake-power9.powerpcle-nf
  scripts/tune/log.fake-power9.ppcp9le
  scripts/tune/log.fake-ppc476.powerpcle
  scripts/tune/log.fake-ppc476.powerpcle-nf
  scripts/tune/log.fake-ppc603e.powerpcle
  scripts/tune/log.fake-ppc603e.powerpcle-nf
  scripts/tune/log.fake-ppc7400.powerpcle
  scripts/tune/log.fake-ppc7400.powerpcle-nf
  scripts/tune/log.fake-ppce300c2.powerpcle
  scripts/tune/log.fake-ppce300c2.powerpcle-nf
  scripts/tune/log.fake-ppce300c3.powerpcle
  scripts/tune/log.fake-ppce300c3.powerpcle-nf
  scripts/tune/log.fake-ppce500.powerpcle
  scripts/tune/log.fake-ppce500.powerpcle-nf
  scripts/tune/log.fake-ppce500mc.powerpcle
  scripts/tune/log.fake-ppce500mc.powerpcle-nf
  scripts/tune/log.fake-ppce500v2.powerpcle
  scripts/tune/log.fake-ppce500v2.powerpcle-nf
  scripts/tune/log.fake-ppce5500.powerpcle
  scripts/tune/log.fake-ppce5500.powerpcle-nf
  scripts/tune/log.fake-ppce6500.powerpcle
  scripts/tune/log.fake-ppce6500.powerpcle-nf

  Parsing recipes...
  ERROR: /OE/build/oe-core/openembedded-core/meta/recipes-support/debianutils/debianutils_4.11.1.bb: Unable to determine endianness for architecture 'powerpcle'
  ERROR: /OE/build/oe-core/openembedded-core/meta/recipes-support/debianutils/debianutils_4.11.1.bb: Please add your architecture to siteinfo.bbclass
  ...

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit a31436f38da27883b42810adf3066ea498ca4a5d)
Signed-off-by: Steve Sakoman <steve@sakoman.com>