Attn: use phal library for get TI info calls

Switch from using pdbg library sbe_mpipl_get_ti_info() to using phal
library getTiInfo() for retrieving pointer to TI info shared memory
region.

Signed-off-by: Ben Tyner <ben.tyner@ibm.com>
Change-Id: I916d9195493b2759eed1695b36b9ae156b37be7e
diff --git a/attn/meson.build b/attn/meson.build
index c366182..8430c07 100644
--- a/attn/meson.build
+++ b/attn/meson.build
@@ -65,6 +65,11 @@
     sdbusplus_dep,
 ]
 
+# conditional library dependencies
+if get_option('phal').enabled()
+  attn_deps += libphal_dep
+endif
+
 # Create static library.
 attn_lib = static_library(
     'attn_lib',