ARM: transform the EABI/OABI choice into a boolean

The CONFIG_ARM_OABI option is never used.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Cc: Khem Raj <raj.khem@gmail.com>
Cc: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Cc: Carmelo AMOROSO <carmelo.amoroso@st.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

extra/Configs/Config.arm

@@ -12,23 +12,16 @@ config FORCE_OPTIONS_FOR_ARCH
 	default y
 	select ARCH_ANY_ENDIAN
 
-choice
+config CONFIG_ARM_EABI
-	prompt "Target ABI"
+	bool "Build for EABI"
-	default CONFIG_ARM_EABI
 	help
-	  If you choose "EABI" here, functions and constants required by the
+	  If you say 'y' here, functions and constants required by the
-	  ARM EABI will be built into the library.  You should choose "EABI"
+	  ARM EABI will be built into the library.  You should say 'y'
 	  if your compiler uses the ARM EABI, in which case you will also
-	  need a kernel supporting the EABI system call interface, or "OABI"
+	  need a kernel supporting the EABI system call interface.
-	  for a compiler using the old Linux ABI.
-
-config CONFIG_ARM_OABI
-	bool "OABI"
-
-config CONFIG_ARM_EABI
-	bool "EABI"
 
-endchoice
+	  If you say 'n' here, then the library will be built for the
+	  old Linux ABI.
 
 config COMPILE_IN_THUMB_MODE
 	bool "Build using Thumb mode"