configs/{ea3250, fdi3250, phy3250}: lock down kernel headers version

Update {ea3250,fdi3250,phy3250}_defconfig to lock down kernel headers to
an appropiate version.
Otherwise the target is building with, at the moment of this writing,
version 3.7 headers and a 2.6.34 kernel which usually isn't wise.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

configs/ea3250_defconfig

@@ -11,6 +11,10 @@ BR2_ARM_EABI=y
 # that will compile a kernel with ethernet working correctly
 BR2_GCC_VERSION_4_3_X=y
 
+# Lock down headers to avoid breaking with new defaults
+BR2_KERNEL_HEADERS_VERSION=y
+BR2_DEFAULT_KERNEL_VERSION="2.6.34.7"
+BR2_DEFAULT_KERNEL_HEADERS="2.6.34.7"
 
 #
 # Host utilities

configs/fdi3250_defconfig

@@ -11,6 +11,10 @@ BR2_ARM_EABI=y
 # that will compile a kernel with ethernet working correctly
 BR2_GCC_VERSION_4_3_X=y
 
+# Lock down headers to avoid breaking with new defaults
+BR2_KERNEL_HEADERS_VERSION=y
+BR2_DEFAULT_KERNEL_VERSION="2.6.34.7"
+BR2_DEFAULT_KERNEL_HEADERS="2.6.34.7"
 
 #
 # Host utilities

configs/phy3250_defconfig

@@ -11,6 +11,10 @@ BR2_ARM_EABI=y
 # that will compile a kernel with ethernet working correctly
 BR2_GCC_VERSION_4_3_X=y
 
+# Lock down headers to avoid breaking with new defaults
+BR2_KERNEL_HEADERS_VERSION=y
+BR2_DEFAULT_KERNEL_VERSION="2.6.34.7"
+BR2_DEFAULT_KERNEL_HEADERS="2.6.34.7"
 
 #
 # Host utilities