confis/qemu_mips64r6*_malta: use the default compiler version (gcc 8.x)

Theses defconfig was added at the when gcc 6 was not the default version
used by Buildroot, so the gcc version was explicitely set.

Since then, gcc 8.x is used as the default. So drop BR2_GCC_VERSION_6_X.

Tested with Qemu 2.8.1 (Debian 1:2.8+dfsg-6+deb9u7)
qemu_mips32r6_malta_defconfig
qemu_mips32r6el_malta_defconfig
qemu_mips64r6_malta_defconfig
qemu_mips64r6el_malta_defconfig

Signed-off-by: Romain Naour <romain.naour@smile.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

configs/qemu_mips32r6_malta_defconfig

@@ -20,10 +20,6 @@ BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
 BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/qemu/mips32r6-malta/linux.config"
 BR2_LINUX_KERNEL_VMLINUX=y
 
-# Compiler
-# linux >= 4.4 uses -mcompact-branches which is only available since gcc-6
-BR2_GCC_VERSION_6_X=y
-
 # Serial port config
 BR2_TARGET_GENERIC_GETTY=y
 BR2_TARGET_GENERIC_GETTY_PORT="ttyS0"

configs/qemu_mips32r6el_malta_defconfig

@@ -20,10 +20,6 @@ BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
 BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/qemu/mips32r6el-malta/linux.config"
 BR2_LINUX_KERNEL_VMLINUX=y
 
-# Compiler
-# linux >= 4.4 uses -mcompact-branches which is only available since GCC 6.x
-BR2_GCC_VERSION_6_X=y
-
 # Serial port config
 BR2_TARGET_GENERIC_GETTY=y
 BR2_TARGET_GENERIC_GETTY_PORT="ttyS0"

configs/qemu_mips64r6_malta_defconfig

@@ -21,10 +21,6 @@ BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
 BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/qemu/mips64r6-malta/linux.config"
 BR2_LINUX_KERNEL_VMLINUX=y
 
-# Compiler
-# linux >= 4.4 uses -mcompact-branches which is only available since gcc-6
-BR2_GCC_VERSION_6_X=y
-
 # Serial port config
 BR2_TARGET_GENERIC_GETTY=y
 BR2_TARGET_GENERIC_GETTY_PORT="ttyS0"

configs/qemu_mips64r6el_malta_defconfig

@@ -21,10 +21,6 @@ BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
 BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/qemu/mips64r6el-malta/linux.config"
 BR2_LINUX_KERNEL_VMLINUX=y
 
-# Compiler
-# linux >= 4.4 uses -mcompact-branches which is only available since gcc-6
-BR2_GCC_VERSION_6_X=y
-
 # Serial port config
 BR2_TARGET_GENERIC_GETTY=y
 BR2_TARGET_GENERIC_GETTY_PORT="ttyS0"