asm: make use regular asserts that will just work on baremetal

Previously had wonky line pointer in asm_main. New interface simpler and more portable.

Add tests for ASSERT_EQ_ and family in arm and aarch64, previously on x86_64.

ASSERT_EQ_ and family in ARM can now either take =123, =addr or var, before this
the = was added on macros so var was not possible.

Define the main function directly in assembly, the C driver was useless.

userland/arch/arm/lkmc_assert_eq_fail.S

@@ -0,0 +1,32 @@
+/* https://github.com/cirosantilli/linux-kernel-module-cheat#userland-assembly */
+
+#include <lkmc.h>
+
+LKMC_PROLOGUE
+    ldr r4, =0x12345678
+    ldr r5, =0x12345678
+
+    /* Passing examples. */
+
+    /* Register immediate. */
+    LKMC_ASSERT_EQ(r4, =0x12345678)
+#if 0
+    /* Syntax not supported. */
+    LKMC_ASSERT_EQ(=0x12345678, r4)
+#endif
+
+    /* Register register. */
+    LKMC_ASSERT_EQ_REG(r4, r5)
+    LKMC_ASSERT_EQ_REG(r5, r4)
+
+    /* Register memory. */
+    LKMC_ASSERT_EQ(r4, myvar)
+#if 0
+    /* Syntax not supported. */
+    LKMC_ASSERT_EQ(myvar, r4)
+#endif
+
+    /* Now let's fail. */
+    LKMC_ASSERT_EQ(r4, =0x12345679)
+LKMC_EPILOGUE
+myvar: .quad 0x12345678