xen/arm32: vfp: Add missing U for shifted constant

When enabling UBSAN on arm32, the following splat will be printed:

(XEN) ================================================================================
(XEN) UBSAN: Undefined behaviour in arch/arm/arm32/vfp.c:75:22
(XEN) left shift of 255 by 24 places cannot be represented in type 'int'

This is referring to the shift in FPSID_IMPLEMENTER_MASK. While we could
only add the U to the value shift there, it would be better to be
consistent and also add it for every value shifted.

This should also addressing MISRA Rule 7.2:

    A "u" or "U" suffix shall be applied to all integer constants that
    are represented in an unsigned type

Signed-off-by: Julien Grall <jgrall@amazon.com>
Reviewed-by: Henry Wang <Henry.Wang@arm.com>
Reviewed-by: Bertrand Marquis <bertrand.marquis@arm.com>

xen/arch/arm/include/asm/arm32/vfp.h

@@ -1,23 +1,23 @@
 #ifndef _ARM_ARM32_VFP_H
 #define _ARM_ARM32_VFP_H
 
-#define FPEXC_EX                (1u << 31)
-#define FPEXC_EN                (1u << 30)
-#define FPEXC_FP2V              (1u << 28)
+#define FPEXC_EX                (1U << 31)
+#define FPEXC_EN                (1U << 30)
+#define FPEXC_FP2V              (1U << 28)
 
-#define MVFR0_A_SIMD_MASK       (0xf << 0)
+#define MVFR0_A_SIMD_MASK       (0xfU << 0)
 
 
 #define FPSID_IMPLEMENTER_BIT   (24)
-#define FPSID_IMPLEMENTER_MASK  (0xff << FPSID_IMPLEMENTER_BIT)
+#define FPSID_IMPLEMENTER_MASK  (0xffU << FPSID_IMPLEMENTER_BIT)
 #define FPSID_ARCH_BIT          (16)
-#define FPSID_ARCH_MASK         (0xf << FPSID_ARCH_BIT)
+#define FPSID_ARCH_MASK         (0xfU << FPSID_ARCH_BIT)
 #define FPSID_PART_BIT          (8)
-#define FPSID_PART_MASK         (0xff << FPSID_PART_BIT)
+#define FPSID_PART_MASK         (0xffU << FPSID_PART_BIT)
 #define FPSID_VARIANT_BIT       (4)
-#define FPSID_VARIANT_MASK      (0xf << FPSID_VARIANT_BIT)
+#define FPSID_VARIANT_MASK      (0xfU << FPSID_VARIANT_BIT)
 #define FPSID_REV_BIT           (0)
-#define FPSID_REV_MASK          (0xf << FPSID_REV_BIT)
+#define FPSID_REV_MASK          (0xfU << FPSID_REV_BIT)
 
 struct vfp_state
 {