Revert "Set -fomit-frame-pointer for all devices"

This reverts commit 20823f95e6d90d7961b3c97ec57b4bcb2b8a24ab.

Reason for revert: caused a minor performance regression in some benchmarks.

Bug: 69470341
Test: builds
Change-Id: I1a852b5d7a2aa1d08ecb54617898f814cddd7600
diff --git a/cc/config/arm_device.go b/cc/config/arm_device.go
index 9512fd1..0f28d1e 100644
--- a/cc/config/arm_device.go
+++ b/cc/config/arm_device.go
@@ -27,7 +27,9 @@
 		"-msoft-float",
 	}
 
-	armCflags = []string{}
+	armCflags = []string{
+		"-fomit-frame-pointer",
+	}
 
 	armCppflags = []string{}