GPL2.0 is not a valid SPDX identiier. Replace it with GPL-2.0.

Fixes: 4a362601baa6 ("x86/jailhouse: Add infrastructure for running in non-root cell")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
---
 arch/x86/include/asm/jailhouse_para.h |    2 +-
 arch/x86/kernel/jailhouse.c           |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

--- a/arch/x86/include/asm/jailhouse_para.h
+++ b/arch/x86/include/asm/jailhouse_para.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL2.0 */
+/* SPDX-License-Identifier: GPL-2.0 */
 
 /*
  * Jailhouse paravirt detection
--- a/arch/x86/kernel/jailhouse.c
+++ b/arch/x86/kernel/jailhouse.c
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL2.0
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Jailhouse paravirt_ops implementation
  *