[PATCH] acpica: fix linker issues when building with ACPI disabled

[Colin King]

From: Colin Ian King <colin.king at canonical.com>

Some toolchains hit linker issues with missing symbols when
building with ACPI disabled.  Work around this by declaring
these symbols even though they are never referenced.

Works around PPC REHL 7.6 build issue:

/root/fwts/src/acpica/.libs/libfwtsacpica.so: undefined reference to
`AcpiGbl_InitEntries'
/root/fwts/src/acpica/.libs/libfwtsacpica.so: undefined reference to
`AcpiGbl_InitFileLineCount'

Fixes: 24f2f2bfbb8f ("ACPICA: Update to version 20180810")
Signed-off-by: Colin Ian King <colin.king at canonical.com>
---
 src/acpica/fwts_acpica.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/acpica/fwts_acpica.c b/src/acpica/fwts_acpica.c
index 4ffe80fd..d0c6ed7c 100644
--- a/src/acpica/fwts_acpica.c
+++ b/src/acpica/fwts_acpica.c
@@ -1373,5 +1373,7 @@ VOID_FUNC(MpSaveSerialInfo)
  */
 unsigned char AcpiGbl_AbortLoopOnTimeout = FALSE;
 unsigned char AcpiGbl_VerboseHandlers = FALSE;
+void *AcpiGbl_InitEntries = NULL;
+uint32_t AcpiGbl_InitFileLineCount = 0;
 
 #endif
-- 
2.19.1