openblas: P5600 and I6400 cores only available for Codescape toolchains

These two MIPS cores are built with MSA support (-mmsa) which is
currently in GCC trunk. The only toolchains that support it right now
are Codescape MTI and Codescape IMG from Imagination Technologies.

Fixes:
  http://autobuild.buildroot.net/results/af5/af5e9f10287aaf9b9be6228ad7d12b2d926f8051/
  http://autobuild.buildroot.net/results/b20/b201e4072b0b634d5ac86781aee24c698f88d689/

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/openblas/Config.in

@@ -26,9 +26,11 @@ config BR2_PACKAGE_OPENBLAS_DEFAULT_TARGET
 	default "PPC970"       if BR2_powerpc_970
 	default "PPC440"       if BR2_powerpc_440
 	default "PPC440FP2"    if BR2_powerpc_440fp
-	default "P5600"        if BR2_mips_32r2
+	# P5600 is built with MSA support which is only available in Codescape toolchains
+	default "P5600"        if BR2_mips_32r2 && BR2_TOOLCHAIN_EXTERNAL_CODESCAPE_MTI_MIPS
 	default "SICORTEX"     if BR2_mips_64
-	default "I6400"        if BR2_mips_64r6
+	# I6400 is built with MSA support which is only available in Codescape toolchains
+	default "I6400"        if BR2_mips_64r6 && BR2_TOOLCHAIN_EXTERNAL_CODESCAPE_IMG_MIPS
 	default "SPARC"        if BR2_sparc
 	default "CORTEXA15"    if BR2_cortex_a15
 	default "CORTEXA9"     if BR2_cortex_a9