Change configure define USRP1 to DEVICE_USRP1
Similar as we do for ARCH_*, it's easier to find those are related to
device support features.
Change-Id: Iba238bff689b8f944af76120402c0fa2e29a70de
diff --git a/configure.ac b/configure.ac
index ee8077c..70a8f4b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -178,7 +178,7 @@
CHECK_BUILTIN_SUPPORT([__builtin_cpu_supports],
[Runtime SIMD detection will be disabled])
-AM_CONDITIONAL(USRP1, [test "x$with_usrp1" = "xyes"])
+AM_CONDITIONAL(DEVICE_USRP1, [test "x$with_usrp1" = "xyes"])
AM_CONDITIONAL(ARCH_ARM, [test "x$with_neon" = "xyes" || test "x$with_neon_vfpv4" = "xyes"])
AM_CONDITIONAL(ARCH_ARM_A15, [test "x$with_neon_vfpv4" = "xyes"])