sam-ba: only propose it if the host is x86 or x86_64

As sam-ba is delivered as a binary for x86

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/sam-ba/Config.in.host

@@ -1,5 +1,6 @@
 config BR2_PACKAGE_HOST_SAM_BA
 	bool "host sam-ba"
+	depends on BR2_HOSTARCH = "x86_64" || BR2_HOSTARCH = "x86"
 	help
 	  Atmel SAM-BA software provides an open set of tools for
 	  programming the Atmel SAM3, SAM7 and SAM9 ARM-based