board: .gitignore: replace dsdt.c by dsdt_generated.c

Since commit 5d94cbd1 ("scripts: Makefile.lib: generate
dsdt_generated.c instead of dsdt.c"), the file generated
is named dsdt_generated.c instead of dsdt.c.
So all files .gitignore referencing dsdt.c should be
upated with dsdt_generated.c.

Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

board/advantech/som-db5800-som-6867/.gitignore

-dsdt.aml
-dsdt.asl.tmp
-dsdt.c
+dsdt_generated.aml
+dsdt_generated.asl.tmp
+dsdt_generated.c

board/congatec/conga-qeval20-qa3-e3845/.gitignore

-dsdt.aml
-dsdt.asl.tmp
-dsdt.c
+dsdt_generated.aml
+dsdt_generated.asl.tmp
+dsdt_generated.c

board/intel/bayleybay/.gitignore

-dsdt.aml
-dsdt.asl.tmp
-dsdt.c
+dsdt_generated.aml
+dsdt_generated.asl.tmp
+dsdt_generated.c

board/intel/edison/.gitignore

-dsdt.aml
-dsdt.asl.tmp
-dsdt.c
+dsdt_generated.aml
+dsdt_generated.asl.tmp
+dsdt_generated.c

board/intel/galileo/.gitignore

-dsdt.aml
-dsdt.asl.tmp
-dsdt.c
+dsdt_generated.aml
+dsdt_generated.asl.tmp
+dsdt_generated.c

board/intel/minnowmax/.gitignore

-dsdt.aml
-dsdt.asl.tmp
-dsdt.c
+dsdt_generated.aml
+dsdt_generated.asl.tmp
+dsdt_generated.c