bsps/powerpc: Remove -fno-common

Remove -fno-common because it is the default since GCC 10.

spec/build/bsps/powerpc/gen5200/abi.yml

@@ -11,7 +11,6 @@ default:
 - -mstrict-align
 - -meabi
 - -msdata=sysv
-- -fno-common
 default-by-variant: []
 description: |
   ABI flags

spec/build/bsps/powerpc/gen83xx/abi.yml

@@ -10,7 +10,6 @@ default:
 - -mcpu=603e
 - -meabi
 - -msdata=sysv
-- -fno-common
 - -mstrict-align
 default-by-variant: []
 description: |

spec/build/bsps/powerpc/mpc55xxevb/abi.yml

@@ -12,7 +12,6 @@ default:
 - -msoft-float
 - -meabi
 - -msdata=sysv
-- -fno-common
 - -mstrict-align
 default-by-variant: []
 description: |

spec/build/bsps/powerpc/mpc8260ads/abi.yml

@@ -12,7 +12,6 @@ default:
 - -mstrict-align
 - -meabi
 - -msdata=sysv
-- -fno-common
 default-by-variant: []
 description: |
   ABI flags

spec/build/bsps/powerpc/psim/abi.yml

@@ -11,7 +11,6 @@ default:
 - -meabi
 - -mcpu=603e
 - -msdata=sysv
-- -fno-common
 default-by-variant: []
 description: |
   ABI flags

spec/build/bsps/powerpc/qoriq/abi.yml

@@ -12,14 +12,12 @@ default:
 - -msoft-float
 - -meabi
 - -msdata=sysv
-- -fno-common
 - -mstrict-align
 default-by-variant:
 - value:
   - -D__ppc_generic
   - -mcpu=e6500
   - -m64
-  - -fno-common
   variants:
   - powerpc/qoriq_e6500_64
 - value:
@@ -27,7 +25,6 @@ default-by-variant:
   - -mcpu=e6500
   - -m32
   - -msdata=sysv
-  - -fno-common
   variants:
   - powerpc/qoriq_e6500_32
 description: |

spec/build/bsps/powerpc/t32mppc/abi.yml

@@ -12,7 +12,6 @@ default:
 - -msoft-float
 - -meabi
 - -msdata=sysv
-- -fno-common
 default-by-variant: []
 description: |
   ABI flags

spec/build/bsps/powerpc/tqm8xx/abi.yml

@@ -13,7 +13,6 @@ default:
 - -fno-strict-aliasing
 - -meabi
 - -msdata=sysv
-- -fno-common
 default-by-variant: []
 description: |
   ABI flags

spec/build/bsps/powerpc/virtex/abi.yml

@@ -11,7 +11,6 @@ default:
 - -mcpu=403
 - -meabi
 - -msdata=sysv
-- -fno-common
 default-by-variant: []
 description: |
   ABI flags