Linux 5.0 compat: ASM_BUG macro

The 5.0 kernel defines the macro ASM_BUG.  In order to prevent a
conflict and build failure rename ASM_BUG to ZFS_ASM_BUG.  This
is currently only an issue on aarch64 but all instances of
ASM_BUG we're renamed to avoid any future conflict on x86_64.

Reviewed-by: Tomohiro Kusumi <kusumi.tomohiro@gmail.com>
Reviewed-by: Richard Laager <rlaager@wiktel.com>
Reviewed-by: Chris Dunlop <chris@onthe.net.au>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #8725 
Issue #8545

module/zfs/vdev_raidz_math_avx2.c

@@ -55,7 +55,7 @@
 #define	_R_23(_0, _1, REG2, REG3, ...) REG2, REG3
 #define	R_23(REG...) _R_23(REG, 1, 2, 3)
 
-#define	ASM_BUG()	ASSERT(0)
+#define	ZFS_ASM_BUG()	ASSERT(0)
 
 extern const uint8_t gf_clmul_mod_lt[4*256][16];
 
@@ -84,7 +84,7 @@ typedef struct v {
 		    : : [SRC] "r" (src));				\
 		break;							\
 	default:							\
-		ASM_BUG();						\
+		ZFS_ASM_BUG();						\
 	}								\
 }
 
@@ -104,7 +104,7 @@ typedef struct v {
 		    "vpxor %" VR1(r) ", %" VR3(r)", %" VR3(r));		\
 		break;							\
 	default:							\
-		ASM_BUG();						\
+		ZFS_ASM_BUG();						\
 	}								\
 }
 
@@ -126,7 +126,7 @@ typedef struct v {
 		    "vmovdqa %" VR1(r) ", %" VR3(r));			\
 		break;							\
 	default:							\
-		ASM_BUG();						\
+		ZFS_ASM_BUG();						\
 	}								\
 }
 
@@ -148,7 +148,7 @@ typedef struct v {
 		    : : [SRC] "r" (src));				\
 		break;							\
 	default:							\
-		ASM_BUG();						\
+		ZFS_ASM_BUG();						\
 	}								\
 }
 
@@ -170,7 +170,7 @@ typedef struct v {
 		    : : [DST] "r" (dst));				\
 		break;							\
 	default:							\
-		ASM_BUG();						\
+		ZFS_ASM_BUG();						\
 	}								\
 }
 
@@ -201,7 +201,7 @@ typedef struct v {
 		    "vpxor    %ymm13,     %" VR1(r)", %" VR1(r));	\
 		break;							\
 	default:							\
-		ASM_BUG();						\
+		ZFS_ASM_BUG();						\
 	}								\
 }
 
@@ -216,7 +216,7 @@ typedef struct v {
 	    _MUL2(r);							\
 	    break;							\
 	default:							\
-		ASM_BUG();						\
+		ZFS_ASM_BUG();						\
 	}								\
 }
 
@@ -277,7 +277,7 @@ static const uint8_t __attribute__((aligned(32))) _mul_mask = 0x0F;
 		    [lt] "r" (gf_clmul_mod_lt[4*(c)]));			\
 		break;							\
 	default:							\
-		ASM_BUG();						\
+		ZFS_ASM_BUG();						\
 	}								\
 }
 
@@ -292,7 +292,7 @@ static const uint8_t __attribute__((aligned(32))) _mul_mask = 0x0F;
 		_MULx2(c, R_01(r));					\
 		break;							\
 	default:							\
-		ASM_BUG();						\
+		ZFS_ASM_BUG();						\
 	}								\
 }